2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
28 #include <libfirm/firm.h>
29 #include <libfirm/adt/obst.h>
30 #include <libfirm/be.h>
34 #include "adt/error.h"
35 #include "adt/array.h"
36 #include "adt/strutil.h"
38 #include "jump_target.h"
45 #include "diagnostic.h"
46 #include "lang_features.h"
48 #include "type_hash.h"
53 #include "entitymap_t.h"
54 #include "driver/firm_opt.h"
56 typedef struct trampoline_region trampoline_region;
57 struct trampoline_region {
58 ir_entity *function; /**< The function that is called by this trampoline */
59 ir_entity *region; /**< created region for the trampoline */
62 fp_model_t firm_fp_model = fp_model_precise;
64 static const backend_params *be_params;
66 static ir_type *ir_type_char;
68 /* architecture specific floating point arithmetic mode (if any) */
69 static ir_mode *mode_float_arithmetic;
71 /* alignment of stack parameters */
72 static unsigned stack_param_align;
74 static int next_value_number_function;
75 static jump_target continue_target;
76 static jump_target break_target;
77 static ir_node *current_switch;
78 static bool saw_default_label;
79 static entity_t **inner_functions;
80 static jump_target ijmp_target;
81 static ir_node **ijmp_ops;
82 static ir_node **ijmp_blocks;
83 static bool constant_folding;
85 #define PUSH_BREAK(val) \
86 jump_target const old_break_target = break_target; \
87 (init_jump_target(&break_target, (val)))
89 ((void)(break_target = old_break_target))
91 #define PUSH_CONTINUE(val) \
92 jump_target const old_continue_target = continue_target; \
93 (init_jump_target(&continue_target, (val)))
94 #define POP_CONTINUE() \
95 ((void)(continue_target = old_continue_target))
97 #define PUSH_IRG(val) \
98 ir_graph *const old_irg = current_ir_graph; \
99 ir_graph *const new_irg = (val); \
100 ((void)(current_ir_graph = new_irg))
103 (assert(current_ir_graph == new_irg), (void)(current_ir_graph = old_irg))
105 static const entity_t *current_function_entity;
106 static ir_node *current_function_name;
107 static ir_node *current_funcsig;
108 static ir_graph *current_function;
109 static translation_unit_t *current_translation_unit;
110 static trampoline_region *current_trampolines;
111 static ir_type *current_outer_frame;
112 static ir_node *current_static_link;
113 static ir_entity *current_vararg_entity;
115 static entitymap_t entitymap;
117 static struct obstack asm_obst;
119 typedef enum declaration_kind_t {
120 DECLARATION_KIND_UNKNOWN,
121 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
122 DECLARATION_KIND_GLOBAL_VARIABLE,
123 DECLARATION_KIND_LOCAL_VARIABLE,
124 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
125 DECLARATION_KIND_PARAMETER,
126 DECLARATION_KIND_PARAMETER_ENTITY,
127 DECLARATION_KIND_FUNCTION,
128 DECLARATION_KIND_COMPOUND_MEMBER,
129 DECLARATION_KIND_INNER_FUNCTION
130 } declaration_kind_t;
132 static ir_type *get_ir_type_incomplete(type_t *type);
134 static void enqueue_inner_function(entity_t *entity)
136 if (inner_functions == NULL)
137 inner_functions = NEW_ARR_F(entity_t *, 0);
138 ARR_APP1(entity_t*, inner_functions, entity);
141 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
143 const entity_t *entity = get_irg_loc_description(irg, pos);
145 if (entity != NULL) {
146 position_t const *const pos = &entity->base.pos;
147 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
149 return new_r_Unknown(irg, mode);
152 static src_loc_t dbg_retrieve(const dbg_info *dbg)
154 position_t const *const pos = (position_t const*)dbg;
156 return (src_loc_t){ pos->input_name, pos->lineno, pos->colno };
158 return (src_loc_t){ NULL, 0, 0 };
162 static dbg_info *get_dbg_info(const position_t *pos)
164 return (dbg_info*) pos;
167 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
168 const type_dbg_info *dbg)
171 print_to_buffer(buffer, buffer_size);
172 const type_t *type = (const type_t*) dbg;
174 finish_print_to_buffer();
177 static type_dbg_info *get_type_dbg_info_(const type_t *type)
179 return (type_dbg_info*) type;
182 /* is the current block a reachable one? */
183 static bool currently_reachable(void)
185 ir_node *const block = get_cur_block();
186 return block != NULL && !is_Bad(block);
189 static void set_unreachable_now(void)
194 ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
196 static ir_node *_expression_to_firm(const expression_t *expression);
197 static ir_node *expression_to_firm(const expression_t *expression);
199 static unsigned decide_modulo_shift(unsigned type_size)
201 if (architecture_modulo_shift == 0)
203 if (type_size < architecture_modulo_shift)
204 return architecture_modulo_shift;
208 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
210 unsigned flags = get_atomic_type_flags(kind);
211 unsigned size = get_atomic_type_size(kind);
212 if (flags & ATOMIC_TYPE_FLAG_FLOAT) {
214 case 4: return get_modeF();
215 case 8: return get_modeD();
216 default: panic("unexpected kind");
218 } else if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
220 unsigned bit_size = size * 8;
221 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
222 unsigned modulo_shift = decide_modulo_shift(bit_size);
224 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U", bit_size);
225 return new_int_mode(name, irma_twos_complement, bit_size, is_signed,
233 * Initialises the atomic modes depending on the machine size.
235 static void init_atomic_modes(void)
237 atomic_modes[ATOMIC_TYPE_VOID] = mode_ANY;
238 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
239 if (atomic_modes[i] != NULL)
241 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
245 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
247 assert(kind <= ATOMIC_TYPE_LAST);
248 return atomic_modes[kind];
251 static ir_node *get_vla_size(array_type_t *const type)
253 ir_node *size_node = type->size_node;
254 if (size_node == NULL) {
255 size_node = expression_to_firm(type->size_expression);
256 type->size_node = size_node;
261 static unsigned count_parameters(const function_type_t *function_type)
265 function_parameter_t *parameter = function_type->parameters;
266 for ( ; parameter != NULL; parameter = parameter->next) {
273 static ir_type *create_primitive_irtype(atomic_type_kind_t akind,
276 ir_mode *mode = atomic_modes[akind];
277 ir_type *irtype = new_d_type_primitive(mode, dbgi);
278 unsigned alignment = get_atomic_type_alignment(akind);
279 unsigned size = get_atomic_type_size(akind);
281 set_type_size_bytes(irtype, size);
282 set_type_alignment_bytes(irtype, alignment);
288 * Creates a Firm type for an atomic type
290 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
292 type_dbg_info *dbgi = get_type_dbg_info_(type);
293 return create_primitive_irtype(akind, dbgi);
297 * Creates a Firm type for a complex type
299 static ir_type *create_complex_type(atomic_type_kind_t akind,
302 type_dbg_info *dbgi = get_type_dbg_info_(type);
303 ir_type *etype = create_primitive_irtype(akind, NULL);
304 ir_type *irtype = new_d_type_array(1, etype, dbgi);
306 int align = get_type_alignment_bytes(etype);
307 set_type_alignment_bytes(irtype, align);
308 unsigned n_elements = 2;
309 set_array_bounds_int(irtype, 0, 0, n_elements);
310 size_t elemsize = get_type_size_bytes(etype);
311 if (elemsize % align > 0) {
312 elemsize += align - (elemsize % align);
314 set_type_size_bytes(irtype, n_elements * elemsize);
320 * Creates a Firm type for an imaginary type
322 static ir_type *create_imaginary_type(const atomic_type_t *type)
324 return create_atomic_type(type->akind, (const type_t*)type);
328 * return type of a parameter (and take transparent union gnu extension into
331 static type_t *get_parameter_type(type_t *orig_type)
333 type_t *type = skip_typeref(orig_type);
334 if (is_type_union(type)
335 && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
336 compound_t *compound = type->compound.compound;
337 type = compound->members.entities->declaration.type;
343 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
345 type_t *return_type = skip_typeref(function_type->return_type);
347 int n_parameters = count_parameters(function_type)
348 + (for_closure ? 1 : 0);
349 int n_results = is_type_void(return_type) ? 0 : 1;
350 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) function_type);
351 ir_type *irtype = new_d_type_method(n_parameters, n_results, dbgi);
353 if (!is_type_void(return_type)) {
354 ir_type *restype = get_ir_type(return_type);
355 set_method_res_type(irtype, 0, restype);
358 function_parameter_t *parameter = function_type->parameters;
361 ir_type *p_irtype = get_ir_type(type_void_ptr);
362 set_method_param_type(irtype, n, p_irtype);
365 for ( ; parameter != NULL; parameter = parameter->next) {
366 type_t *type = get_parameter_type(parameter->type);
367 ir_type *p_irtype = get_ir_type(type);
368 set_method_param_type(irtype, n, p_irtype);
372 bool is_variadic = function_type->variadic;
375 set_method_variadicity(irtype, variadicity_variadic);
377 unsigned cc = get_method_calling_convention(irtype);
378 switch (function_type->calling_convention) {
379 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
382 set_method_calling_convention(irtype, SET_CDECL(cc));
389 /* only non-variadic function can use stdcall, else use cdecl */
390 set_method_calling_convention(irtype, SET_STDCALL(cc));
396 /* only non-variadic function can use fastcall, else use cdecl */
397 set_method_calling_convention(irtype, SET_FASTCALL(cc));
401 /* Hmm, leave default, not accepted by the parser yet. */
406 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
408 const decl_modifiers_t modifiers = function_type->modifiers;
409 if (modifiers & DM_CONST)
410 add_method_additional_properties(irtype, mtp_property_const);
411 if (modifiers & DM_PURE)
412 add_method_additional_properties(irtype, mtp_property_pure);
413 if (modifiers & DM_RETURNS_TWICE)
414 add_method_additional_properties(irtype, mtp_property_returns_twice);
415 if (modifiers & DM_NORETURN)
416 add_method_additional_properties(irtype, mtp_property_noreturn);
417 if (modifiers & DM_NOTHROW)
418 add_method_additional_properties(irtype, mtp_property_nothrow);
419 if (modifiers & DM_MALLOC)
420 add_method_additional_properties(irtype, mtp_property_malloc);
425 static ir_type *create_pointer_type(pointer_type_t *type)
427 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
428 type_t *points_to = type->points_to;
429 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
430 ir_type *irtype = new_d_type_pointer(ir_points_to, dbgi);
435 static ir_type *create_reference_type(reference_type_t *type)
437 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
438 type_t *refers_to = type->refers_to;
439 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
440 ir_type *irtype = new_d_type_pointer(ir_refers_to, dbgi);
445 static ir_type *create_array_type(array_type_t *type)
447 type_dbg_info *dbgi = get_type_dbg_info_((const type_t*) type);
448 type_t *element_type = type->element_type;
449 ir_type *ir_element_type = get_ir_type(element_type);
450 ir_type *irtype = new_d_type_array(1, ir_element_type, dbgi);
452 const int align = get_type_alignment_bytes(ir_element_type);
453 set_type_alignment_bytes(irtype, align);
455 if (type->size_constant) {
456 int n_elements = type->size;
458 set_array_bounds_int(irtype, 0, 0, n_elements);
460 size_t elemsize = get_type_size_bytes(ir_element_type);
461 if (elemsize % align > 0) {
462 elemsize += align - (elemsize % align);
464 set_type_size_bytes(irtype, n_elements * elemsize);
466 set_array_lower_bound_int(irtype, 0, 0);
468 set_type_state(irtype, layout_fixed);
474 * Return the signed integer type of size bits.
476 * @param size the size
478 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
482 static ir_mode *s_modes[64 + 1] = {NULL, };
486 if (size <= 0 || size > 64)
489 mode = s_modes[size];
493 snprintf(name, sizeof(name), "bf_I%u", size);
494 mode = new_int_mode(name, irma_twos_complement, size, 1, 0);
495 s_modes[size] = mode;
498 type_dbg_info *dbgi = get_type_dbg_info_(type);
499 res = new_d_type_primitive(mode, dbgi);
500 set_primitive_base_type(res, base_tp);
506 * Return the unsigned integer type of size bits.
508 * @param size the size
510 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
514 static ir_mode *u_modes[64 + 1] = {NULL, };
518 if (size <= 0 || size > 64)
521 mode = u_modes[size];
525 snprintf(name, sizeof(name), "bf_U%u", size);
526 mode = new_int_mode(name, irma_twos_complement, size, 0, 0);
527 u_modes[size] = mode;
530 type_dbg_info *dbgi = get_type_dbg_info_(type);
531 res = new_d_type_primitive(mode, dbgi);
532 set_primitive_base_type(res, base_tp);
537 static ir_type *create_bitfield_type(const entity_t *entity)
539 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
540 type_t *base = skip_typeref(entity->declaration.type);
541 assert(is_type_integer(base));
542 ir_type *irbase = get_ir_type(base);
544 unsigned bit_size = entity->compound_member.bit_size;
546 if (is_type_signed(base)) {
547 return get_signed_int_type_for_bit_size(irbase, bit_size, base);
549 return get_unsigned_int_type_for_bit_size(irbase, bit_size, base);
554 * Construct firm type from ast struct type.
556 static ir_type *create_compound_type(compound_type_t *const type, bool const incomplete)
558 compound_t *compound = type->compound;
560 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
561 return compound->irtype;
564 bool const is_union = type->base.kind == TYPE_COMPOUND_UNION;
566 symbol_t *type_symbol = compound->base.symbol;
568 if (type_symbol != NULL) {
569 id = new_id_from_str(type_symbol->string);
572 id = id_unique("__anonymous_union.%u");
574 id = id_unique("__anonymous_struct.%u");
580 irtype = new_type_union(id);
582 irtype = new_type_struct(id);
585 compound->irtype_complete = false;
586 compound->irtype = irtype;
592 layout_union_type(type);
594 layout_struct_type(type);
597 compound->irtype_complete = true;
599 entity_t *entry = compound->members.entities;
600 for ( ; entry != NULL; entry = entry->base.next) {
601 if (entry->kind != ENTITY_COMPOUND_MEMBER)
604 symbol_t *symbol = entry->base.symbol;
605 type_t *entry_type = entry->declaration.type;
607 if (symbol == NULL) {
608 /* anonymous bitfield member, skip */
609 if (entry->compound_member.bitfield)
611 assert(is_type_compound(entry_type));
612 ident = id_unique("anon.%u");
614 ident = new_id_from_str(symbol->string);
617 dbg_info *dbgi = get_dbg_info(&entry->base.pos);
619 ir_type *entry_irtype;
620 if (entry->compound_member.bitfield) {
621 entry_irtype = create_bitfield_type(entry);
623 entry_irtype = get_ir_type(entry_type);
625 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
627 set_entity_offset(entity, entry->compound_member.offset);
628 set_entity_offset_bits_remainder(entity,
629 entry->compound_member.bit_offset);
631 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
632 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
633 entry->compound_member.entity = entity;
636 set_type_alignment_bytes(irtype, compound->alignment);
637 set_type_size_bytes(irtype, compound->size);
638 set_type_state(irtype, layout_fixed);
643 void determine_enum_values(enum_type_t *const type)
645 ir_mode *const mode = atomic_modes[type->base.akind];
646 ir_tarval *const one = get_mode_one(mode);
647 ir_tarval * tv_next = get_mode_null(mode);
649 enum_t *enume = type->enume;
650 entity_t *entry = enume->base.next;
651 for (; entry != NULL; entry = entry->base.next) {
652 if (entry->kind != ENTITY_ENUM_VALUE)
655 expression_t *const init = entry->enum_value.value;
657 tv_next = fold_constant_to_tarval(init);
659 assert(entry->enum_value.tv == NULL || entry->enum_value.tv == tv_next);
660 entry->enum_value.tv = tv_next;
661 tv_next = tarval_add(tv_next, one);
665 static ir_type *create_enum_type(enum_type_t *const type)
667 return create_atomic_type(type->base.akind, (const type_t*) type);
670 static ir_type *get_ir_type_incomplete(type_t *type)
672 type = skip_typeref(type);
674 if (type->base.firm_type != NULL) {
675 return type->base.firm_type;
678 if (is_type_compound(type)) {
679 return create_compound_type(&type->compound, true);
681 return get_ir_type(type);
685 ir_type *get_ir_type(type_t *type)
687 type = skip_typeref(type);
689 if (type->base.firm_type != NULL) {
690 return type->base.firm_type;
693 ir_type *firm_type = NULL;
694 switch (type->kind) {
696 firm_type = create_atomic_type(type->atomic.akind, type);
699 firm_type = create_complex_type(type->atomic.akind, type);
702 firm_type = create_imaginary_type(&type->atomic);
705 firm_type = create_method_type(&type->function, false);
708 firm_type = create_pointer_type(&type->pointer);
711 firm_type = create_reference_type(&type->reference);
714 firm_type = create_array_type(&type->array);
716 case TYPE_COMPOUND_STRUCT:
717 case TYPE_COMPOUND_UNION:
718 firm_type = create_compound_type(&type->compound, false);
721 firm_type = create_enum_type(&type->enumt);
729 if (firm_type == NULL)
730 panic("unknown type found");
732 type->base.firm_type = firm_type;
736 static ir_mode *get_ir_mode_storage(type_t *type)
738 type = skip_typeref(type);
740 /* Firm doesn't report a mode for arrays and structs/unions. */
741 if (!is_type_scalar(type)) {
745 ir_type *const irtype = get_ir_type(type);
746 ir_mode *const mode = get_type_mode(irtype);
747 assert(mode != NULL);
752 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
753 * int that it returns bigger modes for floating point on some platforms
754 * (x87 internally does arithemtic with 80bits)
756 static ir_mode *get_ir_mode_arithmetic(type_t *type)
758 ir_mode *mode = get_ir_mode_storage(type);
759 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
760 return mode_float_arithmetic;
767 * Return a node representing the size of a type.
769 static ir_node *get_type_size_node(type_t *type)
772 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
773 type = skip_typeref(type);
775 if (is_type_array(type) && type->array.is_vla) {
776 ir_node *size_node = get_vla_size(&type->array);
777 ir_node *elem_size = get_type_size_node(type->array.element_type);
778 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
782 size = get_type_size(type);
783 return new_Const_long(mode, size);
786 /** Names of the runtime functions. */
787 static const struct {
788 int id; /**< the rts id */
789 int n_res; /**< number of return values */
790 const char *name; /**< the name of the rts function */
791 int n_params; /**< number of parameters */
792 unsigned flags; /**< language flags */
794 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
795 { rts_abort, 0, "abort", 0, _C89 },
796 { rts_alloca, 1, "alloca", 1, _ALL },
797 { rts_abs, 1, "abs", 1, _C89 },
798 { rts_labs, 1, "labs", 1, _C89 },
799 { rts_llabs, 1, "llabs", 1, _C99 },
800 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
802 { rts_fabs, 1, "fabs", 1, _C89 },
803 { rts_sqrt, 1, "sqrt", 1, _C89 },
804 { rts_cbrt, 1, "cbrt", 1, _C99 },
805 { rts_exp, 1, "exp", 1, _C89 },
806 { rts_exp2, 1, "exp2", 1, _C89 },
807 { rts_exp10, 1, "exp10", 1, _GNUC },
808 { rts_log, 1, "log", 1, _C89 },
809 { rts_log2, 1, "log2", 1, _C89 },
810 { rts_log10, 1, "log10", 1, _C89 },
811 { rts_pow, 1, "pow", 2, _C89 },
812 { rts_sin, 1, "sin", 1, _C89 },
813 { rts_cos, 1, "cos", 1, _C89 },
814 { rts_tan, 1, "tan", 1, _C89 },
815 { rts_asin, 1, "asin", 1, _C89 },
816 { rts_acos, 1, "acos", 1, _C89 },
817 { rts_atan, 1, "atan", 1, _C89 },
818 { rts_sinh, 1, "sinh", 1, _C89 },
819 { rts_cosh, 1, "cosh", 1, _C89 },
820 { rts_tanh, 1, "tanh", 1, _C89 },
822 { rts_fabsf, 1, "fabsf", 1, _C99 },
823 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
824 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
825 { rts_expf, 1, "expf", 1, _C99 },
826 { rts_exp2f, 1, "exp2f", 1, _C99 },
827 { rts_exp10f, 1, "exp10f", 1, _GNUC },
828 { rts_logf, 1, "logf", 1, _C99 },
829 { rts_log2f, 1, "log2f", 1, _C99 },
830 { rts_log10f, 1, "log10f", 1, _C99 },
831 { rts_powf, 1, "powf", 2, _C99 },
832 { rts_sinf, 1, "sinf", 1, _C99 },
833 { rts_cosf, 1, "cosf", 1, _C99 },
834 { rts_tanf, 1, "tanf", 1, _C99 },
835 { rts_asinf, 1, "asinf", 1, _C99 },
836 { rts_acosf, 1, "acosf", 1, _C99 },
837 { rts_atanf, 1, "atanf", 1, _C99 },
838 { rts_sinhf, 1, "sinhf", 1, _C99 },
839 { rts_coshf, 1, "coshf", 1, _C99 },
840 { rts_tanhf, 1, "tanhf", 1, _C99 },
842 { rts_fabsl, 1, "fabsl", 1, _C99 },
843 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
844 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
845 { rts_expl, 1, "expl", 1, _C99 },
846 { rts_exp2l, 1, "exp2l", 1, _C99 },
847 { rts_exp10l, 1, "exp10l", 1, _GNUC },
848 { rts_logl, 1, "logl", 1, _C99 },
849 { rts_log2l, 1, "log2l", 1, _C99 },
850 { rts_log10l, 1, "log10l", 1, _C99 },
851 { rts_powl, 1, "powl", 2, _C99 },
852 { rts_sinl, 1, "sinl", 1, _C99 },
853 { rts_cosl, 1, "cosl", 1, _C99 },
854 { rts_tanl, 1, "tanl", 1, _C99 },
855 { rts_asinl, 1, "asinl", 1, _C99 },
856 { rts_acosl, 1, "acosl", 1, _C99 },
857 { rts_atanl, 1, "atanl", 1, _C99 },
858 { rts_sinhl, 1, "sinhl", 1, _C99 },
859 { rts_coshl, 1, "coshl", 1, _C99 },
860 { rts_tanhl, 1, "tanhl", 1, _C99 },
862 { rts_strcmp, 1, "strcmp", 2, _C89 },
863 { rts_strncmp, 1, "strncmp", 3, _C89 },
864 { rts_strcpy, 1, "strcpy", 2, _C89 },
865 { rts_strlen, 1, "strlen", 1, _C89 },
866 { rts_memcpy, 1, "memcpy", 3, _C89 },
867 { rts_mempcpy, 1, "mempcpy", 3, _GNUC },
868 { rts_memmove, 1, "memmove", 3, _C89 },
869 { rts_memset, 1, "memset", 3, _C89 },
870 { rts_memcmp, 1, "memcmp", 3, _C89 },
873 static ident *rts_idents[lengthof(rts_data)];
875 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
877 void set_create_ld_ident(ident *(*func)(entity_t*))
879 create_ld_ident = func;
882 static bool declaration_is_definition(const entity_t *entity)
884 switch (entity->kind) {
885 case ENTITY_VARIABLE:
886 return entity->declaration.storage_class != STORAGE_CLASS_EXTERN;
887 case ENTITY_FUNCTION:
888 return entity->function.body != NULL;
889 case ENTITY_PARAMETER:
890 case ENTITY_COMPOUND_MEMBER:
894 case ENTITY_ENUM_VALUE:
895 case ENTITY_NAMESPACE:
897 case ENTITY_LOCAL_LABEL:
900 panic("entity is not a declaration");
904 * Handle GNU attributes for entities
906 * @param ent the entity
907 * @param decl the routine declaration
909 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
911 assert(is_declaration(entity));
912 decl_modifiers_t modifiers = entity->declaration.modifiers;
914 if (is_method_entity(irentity)) {
915 if (modifiers & DM_PURE)
916 add_entity_additional_properties(irentity, mtp_property_pure);
917 if (modifiers & DM_CONST)
918 add_entity_additional_properties(irentity, mtp_property_const);
919 if (modifiers & DM_NOINLINE)
920 add_entity_additional_properties(irentity, mtp_property_noinline);
921 if (modifiers & DM_FORCEINLINE)
922 add_entity_additional_properties(irentity, mtp_property_always_inline);
923 if (modifiers & DM_NAKED)
924 add_entity_additional_properties(irentity, mtp_property_naked);
925 if (entity->kind == ENTITY_FUNCTION && entity->function.is_inline)
926 add_entity_additional_properties(irentity,
927 mtp_property_inline_recommended);
929 if ((modifiers & DM_USED) && declaration_is_definition(entity)) {
930 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
932 if ((modifiers & DM_WEAK) && declaration_is_definition(entity)
933 && entity->declaration.storage_class != STORAGE_CLASS_EXTERN) {
934 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
938 static bool is_main(entity_t *entity)
940 static symbol_t *sym_main = NULL;
941 if (sym_main == NULL) {
942 sym_main = symbol_table_insert("main");
945 if (entity->base.symbol != sym_main)
947 /* must be in outermost scope */
948 if (entity->base.parent_scope != ¤t_translation_unit->scope)
955 * Creates an entity representing a function.
957 * @param entity the function declaration/definition
958 * @param owner_type the owner type of this function, NULL
959 * for global functions
961 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
963 assert(entity->kind == ENTITY_FUNCTION);
964 if (entity->function.irentity != NULL)
965 return entity->function.irentity;
967 switch (entity->function.btk) {
970 case BUILTIN_LIBC_CHECK:
976 symbol_t *symbol = entity->base.symbol;
977 ident *id = new_id_from_str(symbol->string);
979 /* already an entity defined? */
980 ir_entity *irentity = entitymap_get(&entitymap, symbol);
981 bool const has_body = entity->function.body != NULL;
982 if (irentity != NULL) {
986 ir_type *ir_type_method;
987 if (entity->function.need_closure)
988 ir_type_method = create_method_type(&entity->declaration.type->function, true);
990 ir_type_method = get_ir_type(entity->declaration.type);
992 bool nested_function = false;
993 if (owner_type == NULL)
994 owner_type = get_glob_type();
996 nested_function = true;
998 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
999 irentity = new_d_entity(owner_type, id, ir_type_method, dbgi);
1002 if (nested_function)
1003 ld_id = id_unique("inner.%u");
1005 ld_id = create_ld_ident(entity);
1006 set_entity_ld_ident(irentity, ld_id);
1008 handle_decl_modifiers(irentity, entity);
1010 if (! nested_function) {
1011 storage_class_tag_t const storage_class
1012 = (storage_class_tag_t) entity->declaration.storage_class;
1013 if (storage_class == STORAGE_CLASS_STATIC) {
1014 set_entity_visibility(irentity, ir_visibility_local);
1016 set_entity_visibility(irentity, ir_visibility_external);
1019 bool const is_inline = entity->function.is_inline;
1020 if (is_inline && has_body) {
1021 if (((c_mode & _C99) && storage_class == STORAGE_CLASS_NONE)
1022 || ((c_mode & _C99) == 0
1023 && storage_class == STORAGE_CLASS_EXTERN)) {
1024 add_entity_linkage(irentity, IR_LINKAGE_NO_CODEGEN);
1028 /* nested functions are always local */
1029 set_entity_visibility(irentity, ir_visibility_local);
1032 /* We should check for file scope here, but as long as we compile C only
1033 this is not needed. */
1034 if (!freestanding && !has_body) {
1035 /* check for a known runtime function */
1036 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1037 if (id != rts_idents[i])
1040 function_type_t *function_type
1041 = &entity->declaration.type->function;
1042 /* rts_entities code can't handle a "wrong" number of parameters */
1043 if (function_type->unspecified_parameters)
1046 /* check number of parameters */
1047 int n_params = count_parameters(function_type);
1048 if (n_params != rts_data[i].n_params)
1051 type_t *return_type = skip_typeref(function_type->return_type);
1052 int n_res = is_type_void(return_type) ? 0 : 1;
1053 if (n_res != rts_data[i].n_res)
1056 /* ignore those rts functions not necessary needed for current mode */
1057 if ((c_mode & rts_data[i].flags) == 0)
1059 assert(rts_entities[rts_data[i].id] == NULL);
1060 rts_entities[rts_data[i].id] = irentity;
1064 entitymap_insert(&entitymap, symbol, irentity);
1067 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1068 entity->function.irentity = irentity;
1074 * Creates a SymConst for a given entity.
1076 * @param dbgi debug info
1077 * @param entity the entity
1079 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1081 assert(entity != NULL);
1082 union symconst_symbol sym;
1083 sym.entity_p = entity;
1084 return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1087 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1089 return new_Const((v ? get_mode_one : get_mode_null)(mode));
1092 static ir_node *create_conv_from_b(dbg_info *dbgi, ir_node *value,
1095 if (is_Const(value)) {
1096 return create_Const_from_bool(dest_mode, !is_Const_null(value));
1099 ir_node *cond = new_d_Cond(dbgi, value);
1100 ir_node *proj_true = new_Proj(cond, mode_X, pn_Cond_true);
1101 ir_node *proj_false = new_Proj(cond, mode_X, pn_Cond_false);
1102 ir_node *tblock = new_Block(1, &proj_true);
1103 ir_node *fblock = new_Block(1, &proj_false);
1104 set_cur_block(tblock);
1105 ir_node *const1 = new_Const(get_mode_one(dest_mode));
1106 ir_node *tjump = new_Jmp();
1107 set_cur_block(fblock);
1108 ir_node *const0 = new_Const(get_mode_null(dest_mode));
1109 ir_node *fjump = new_Jmp();
1111 ir_node *in[2] = { tjump, fjump };
1112 ir_node *mergeblock = new_Block(2, in);
1113 set_cur_block(mergeblock);
1114 ir_node *phi_in[2] = { const1, const0 };
1115 ir_node *phi = new_Phi(2, phi_in, dest_mode);
1119 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1121 ir_mode *value_mode = get_irn_mode(value);
1123 if (value_mode == dest_mode)
1126 if (dest_mode == mode_b) {
1127 ir_node *zero = new_Const(get_mode_null(value_mode));
1128 ir_node *cmp = new_d_Cmp(dbgi, value, zero, ir_relation_unordered_less_greater);
1130 } else if (value_mode == mode_b) {
1131 return create_conv_from_b(dbgi, value, dest_mode);
1134 return new_d_Conv(dbgi, value, dest_mode);
1138 * Creates a SymConst node representing a string constant.
1140 * @param src_pos the source position of the string constant
1141 * @param id_prefix a prefix for the name of the generated string constant
1142 * @param value the value of the string constant
1144 static ir_node *string_to_firm(position_t const *const src_pos, char const *const id_prefix, string_t const *const value)
1146 size_t const slen = get_string_len(value) + 1;
1147 ir_initializer_t *const initializer = create_initializer_compound(slen);
1148 ir_type * elem_type;
1149 switch (value->encoding) {
1150 case STRING_ENCODING_CHAR:
1151 case STRING_ENCODING_UTF8: {
1152 elem_type = ir_type_char;
1154 ir_mode *const mode = get_type_mode(elem_type);
1155 char const *p = value->begin;
1156 for (size_t i = 0; i < slen; ++i) {
1157 ir_tarval *tv = new_tarval_from_long(*p++, mode);
1158 ir_initializer_t *val = create_initializer_tarval(tv);
1159 set_initializer_compound_value(initializer, i, val);
1166 case STRING_ENCODING_CHAR16: type = type_char16_t; goto init_wide;
1167 case STRING_ENCODING_CHAR32: type = type_char32_t; goto init_wide;
1168 case STRING_ENCODING_WIDE: type = type_wchar_t; goto init_wide;
1170 elem_type = get_ir_type(type);
1172 ir_mode *const mode = get_type_mode(elem_type);
1173 char const *p = value->begin;
1174 for (size_t i = 0; i < slen; ++i) {
1175 assert(p <= value->begin + value->size);
1176 utf32 v = read_utf8_char(&p);
1177 ir_tarval *tv = new_tarval_from_long(v, mode);
1178 ir_initializer_t *val = create_initializer_tarval(tv);
1179 set_initializer_compound_value(initializer, i, val);
1184 panic("invalid string encoding");
1187 ir_type *const type = new_type_array(1, elem_type);
1188 set_array_bounds_int(type, 0, 0, slen);
1189 set_type_size_bytes( type, slen * get_type_size_bytes(elem_type));
1190 set_type_state( type, layout_fixed);
1192 ir_type *const global_type = get_glob_type();
1193 ident *const id = id_unique(id_prefix);
1194 dbg_info *const dbgi = get_dbg_info(src_pos);
1195 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1196 set_entity_ld_ident( entity, id);
1197 set_entity_visibility( entity, ir_visibility_private);
1198 add_entity_linkage( entity, IR_LINKAGE_CONSTANT);
1199 set_entity_initializer(entity, initializer);
1201 return create_symconst(dbgi, entity);
1204 static bool try_create_integer(literal_expression_t *literal, type_t *type)
1206 assert(type->kind == TYPE_ATOMIC);
1207 atomic_type_kind_t akind = type->atomic.akind;
1209 ir_mode *const mode = atomic_modes[akind];
1210 char const *const str = literal->value.begin;
1211 ir_tarval *const tv = new_tarval_from_str(str, literal->suffix - str, mode);
1212 if (tv == tarval_bad)
1215 literal->base.type = type;
1216 literal->target_value = tv;
1220 void determine_literal_type(literal_expression_t *const literal)
1222 assert(literal->base.kind == EXPR_LITERAL_INTEGER);
1224 /* -1: signed only, 0: any, 1: unsigned only */
1226 !is_type_signed(literal->base.type) ? 1 :
1227 literal->value.begin[0] == '0' ? 0 :
1228 -1; /* Decimal literals only try signed types. */
1230 tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1231 tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1233 if (try_create_integer(literal, literal->base.type))
1236 /* now try if the constant is small enough for some types */
1237 if (sign >= 0 && try_create_integer(literal, type_unsigned_int))
1239 if (sign <= 0 && try_create_integer(literal, type_long))
1241 if (sign >= 0 && try_create_integer(literal, type_unsigned_long))
1243 /* last try? then we should not report tarval_bad */
1245 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1246 if (sign <= 0 && try_create_integer(literal, type_long_long))
1251 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1252 bool res = try_create_integer(literal, type_unsigned_long_long);
1254 panic("internal error when parsing number literal");
1257 tarval_set_integer_overflow_mode(old_mode);
1261 * Creates a Const node representing a constant.
1263 static ir_node *literal_to_firm(const literal_expression_t *literal)
1265 type_t *type = skip_typeref(literal->base.type);
1266 ir_mode *mode = get_ir_mode_storage(type);
1267 const char *string = literal->value.begin;
1268 size_t size = literal->value.size;
1271 switch (literal->base.kind) {
1272 case EXPR_LITERAL_INTEGER:
1273 assert(literal->target_value != NULL);
1274 tv = literal->target_value;
1277 case EXPR_LITERAL_FLOATINGPOINT:
1278 tv = new_tarval_from_str(string, size, mode);
1281 case EXPR_LITERAL_BOOLEAN:
1282 if (string[0] == 't') {
1283 tv = get_mode_one(mode);
1285 assert(string[0] == 'f');
1286 case EXPR_LITERAL_MS_NOOP:
1287 tv = get_mode_null(mode);
1292 panic("invalid literal kind");
1295 dbg_info *dbgi = get_dbg_info(&literal->base.pos);
1296 ir_node *res = new_d_Const(dbgi, tv);
1297 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1298 return create_conv(dbgi, res, mode_arith);
1302 * Creates a Const node representing a character constant.
1304 static ir_node *char_literal_to_firm(string_literal_expression_t const *literal)
1306 type_t *type = skip_typeref(literal->base.type);
1307 ir_mode *mode = get_ir_mode_storage(type);
1308 const char *string = literal->value.begin;
1309 size_t size = literal->value.size;
1312 switch (literal->value.encoding) {
1313 case STRING_ENCODING_WIDE: {
1314 utf32 v = read_utf8_char(&string);
1316 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1318 tv = new_tarval_from_str(buf, len, mode);
1322 case STRING_ENCODING_CHAR: {
1325 = get_atomic_type_flags(ATOMIC_TYPE_CHAR) & ATOMIC_TYPE_FLAG_SIGNED;
1326 if (size == 1 && char_is_signed) {
1327 v = (signed char)string[0];
1330 for (size_t i = 0; i < size; ++i) {
1331 v = (v << 8) | ((unsigned char)string[i]);
1335 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1337 tv = new_tarval_from_str(buf, len, mode);
1342 panic("invalid literal kind");
1345 dbg_info *dbgi = get_dbg_info(&literal->base.pos);
1346 ir_node *res = new_d_Const(dbgi, tv);
1347 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1348 return create_conv(dbgi, res, mode_arith);
1352 * Allocate an area of size bytes aligned at alignment
1355 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1357 static unsigned area_cnt = 0;
1360 ir_type *tp = new_type_array(1, ir_type_char);
1361 set_array_bounds_int(tp, 0, 0, size);
1362 set_type_alignment_bytes(tp, alignment);
1364 snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1365 ident *name = new_id_from_str(buf);
1366 ir_entity *area = new_entity(frame_type, name, tp);
1368 /* mark this entity as compiler generated */
1369 set_entity_compiler_generated(area, 1);
1374 * Return a node representing a trampoline region
1375 * for a given function entity.
1377 * @param dbgi debug info
1378 * @param entity the function entity
1380 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1382 ir_entity *region = NULL;
1385 if (current_trampolines != NULL) {
1386 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1387 if (current_trampolines[i].function == entity) {
1388 region = current_trampolines[i].region;
1393 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1395 ir_graph *irg = current_ir_graph;
1396 if (region == NULL) {
1397 /* create a new region */
1398 ir_type *frame_tp = get_irg_frame_type(irg);
1399 trampoline_region reg;
1400 reg.function = entity;
1402 reg.region = alloc_trampoline(frame_tp,
1403 be_params->trampoline_size,
1404 be_params->trampoline_align);
1405 ARR_APP1(trampoline_region, current_trampolines, reg);
1406 region = reg.region;
1408 return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1413 * Creates a trampoline for a function represented by an entity.
1415 * @param dbgi debug info
1416 * @param mode the (reference) mode for the function address
1417 * @param entity the function entity
1419 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1422 assert(entity != NULL);
1424 in[0] = get_trampoline_region(dbgi, entity);
1425 in[1] = create_symconst(dbgi, entity);
1426 in[2] = get_irg_frame(current_ir_graph);
1428 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1429 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1430 return new_Proj(irn, mode, pn_Builtin_max+1);
1434 * Dereference an address.
1436 * @param dbgi debug info
1437 * @param type the type of the dereferenced result (the points_to type)
1438 * @param addr the address to dereference
1440 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1441 ir_node *const addr)
1443 type_t *skipped = skip_typeref(type);
1444 if (is_type_incomplete(skipped))
1447 ir_type *irtype = get_ir_type(skipped);
1448 if (is_compound_type(irtype)
1449 || is_Method_type(irtype)
1450 || is_Array_type(irtype)) {
1454 ir_cons_flags flags = skipped->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1455 ? cons_volatile : cons_none;
1456 ir_mode *const mode = get_type_mode(irtype);
1457 ir_node *const memory = get_store();
1458 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1459 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1460 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1462 set_store(load_mem);
1464 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(skipped);
1465 return create_conv(dbgi, load_res, mode_arithmetic);
1469 * Returns the correct base address depending on whether it is a parameter or a
1470 * normal local variable.
1472 static ir_node *get_local_frame(ir_entity *const ent)
1474 ir_graph *const irg = current_ir_graph;
1475 const ir_type *const owner = get_entity_owner(ent);
1476 if (owner == current_outer_frame) {
1477 assert(current_static_link != NULL);
1478 return current_static_link;
1480 return get_irg_frame(irg);
1485 * Keep the current block and memory.
1486 * This is necessary for all loops, because they could become infinite.
1488 static void keep_loop(void)
1490 keep_alive(get_cur_block());
1491 keep_alive(get_store());
1494 static ir_node *enum_constant_to_firm(reference_expression_t const *const ref)
1496 entity_t *entity = ref->entity;
1497 if (entity->enum_value.tv == NULL) {
1498 type_t *type = skip_typeref(entity->enum_value.enum_type);
1499 assert(type->kind == TYPE_ENUM);
1500 determine_enum_values(&type->enumt);
1503 return new_Const(entity->enum_value.tv);
1506 static ir_node *reference_addr(const reference_expression_t *ref)
1508 dbg_info *dbgi = get_dbg_info(&ref->base.pos);
1509 entity_t *entity = ref->entity;
1510 assert(is_declaration(entity));
1512 if (entity->kind == ENTITY_FUNCTION
1513 && entity->function.btk != BUILTIN_NONE) {
1514 ir_entity *irentity = get_function_entity(entity, NULL);
1515 /* for gcc compatibility we have to produce (dummy) addresses for some
1516 * builtins which don't have entities */
1517 if (irentity == NULL) {
1518 position_t const *const pos = &ref->base.pos;
1519 warningf(WARN_OTHER, pos, "taking address of builtin '%N'", ref->entity);
1521 /* simply create a NULL pointer */
1522 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
1523 ir_node *res = new_Const(get_mode_null(mode));
1529 switch((declaration_kind_t) entity->declaration.kind) {
1530 case DECLARATION_KIND_UNKNOWN:
1532 case DECLARATION_KIND_PARAMETER:
1533 case DECLARATION_KIND_LOCAL_VARIABLE:
1534 /* you can store to a local variable (so we don't panic but return NULL
1535 * as an indicator for no real address) */
1537 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1538 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1542 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
1543 case DECLARATION_KIND_PARAMETER_ENTITY: {
1544 ir_entity *irentity = entity->variable.v.entity;
1545 ir_node *frame = get_local_frame(irentity);
1546 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1550 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1551 return entity->variable.v.vla_base;
1553 case DECLARATION_KIND_FUNCTION: {
1554 return create_symconst(dbgi, entity->function.irentity);
1557 case DECLARATION_KIND_INNER_FUNCTION: {
1558 type_t *const type = skip_typeref(entity->declaration.type);
1559 ir_mode *const mode = get_ir_mode_storage(type);
1560 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1561 /* inner function not using the closure */
1562 return create_symconst(dbgi, entity->function.irentity);
1564 /* need trampoline here */
1565 return create_trampoline(dbgi, mode, entity->function.irentity);
1569 case DECLARATION_KIND_COMPOUND_MEMBER:
1570 panic("not implemented reference type");
1573 panic("reference to declaration with unknown type");
1576 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1578 dbg_info *const dbgi = get_dbg_info(&ref->base.pos);
1579 entity_t *const entity = ref->entity;
1580 assert(is_declaration(entity));
1582 switch ((declaration_kind_t)entity->declaration.kind) {
1583 case DECLARATION_KIND_LOCAL_VARIABLE:
1584 case DECLARATION_KIND_PARAMETER: {
1585 type_t *const type = skip_typeref(entity->declaration.type);
1586 ir_mode *const mode = get_ir_mode_storage(type);
1587 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1588 return create_conv(dbgi, value, get_ir_mode_arithmetic(type));
1592 ir_node *const addr = reference_addr(ref);
1593 return deref_address(dbgi, entity->declaration.type, addr);
1599 * Transform calls to builtin functions.
1601 static ir_node *process_builtin_call(const call_expression_t *call)
1603 dbg_info *dbgi = get_dbg_info(&call->base.pos);
1605 assert(call->function->kind == EXPR_REFERENCE);
1606 reference_expression_t *builtin = &call->function->reference;
1608 type_t *expr_type = skip_typeref(builtin->base.type);
1609 assert(is_type_pointer(expr_type));
1611 type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1613 switch (builtin->entity->function.btk) {
1616 case BUILTIN_ALLOCA: {
1617 expression_t *argument = call->arguments->expression;
1618 ir_node *size = expression_to_firm(argument);
1620 ir_node *store = get_store();
1621 ir_node *alloca = new_d_Alloc(dbgi, store, size, get_unknown_type(),
1623 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1625 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1630 type_t *type = function_type->function.return_type;
1631 ir_mode *mode = get_ir_mode_arithmetic(type);
1632 ir_tarval *tv = get_mode_infinite(mode);
1633 ir_node *res = new_d_Const(dbgi, tv);
1637 /* Ignore string for now... */
1638 assert(is_type_function(function_type));
1639 type_t *type = function_type->function.return_type;
1640 ir_mode *mode = get_ir_mode_arithmetic(type);
1641 ir_tarval *tv = get_mode_NAN(mode);
1642 ir_node *res = new_d_Const(dbgi, tv);
1645 case BUILTIN_EXPECT: {
1646 expression_t *argument = call->arguments->expression;
1647 return _expression_to_firm(argument);
1649 case BUILTIN_VA_END:
1650 /* evaluate the argument of va_end for its side effects */
1651 _expression_to_firm(call->arguments->expression);
1653 case BUILTIN_OBJECT_SIZE: {
1654 /* determine value of "type" */
1655 expression_t *type_expression = call->arguments->next->expression;
1656 long type_val = fold_constant_to_int(type_expression);
1657 type_t *type = function_type->function.return_type;
1658 ir_mode *mode = get_ir_mode_arithmetic(type);
1659 /* just produce a "I don't know" result */
1660 ir_tarval *result = type_val & 2 ? get_mode_null(mode) :
1661 get_mode_minus_one(mode);
1663 return new_d_Const(dbgi, result);
1665 case BUILTIN_ROTL: {
1666 ir_node *val = expression_to_firm(call->arguments->expression);
1667 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1668 ir_mode *mode = get_irn_mode(val);
1669 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1670 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1672 case BUILTIN_ROTR: {
1673 ir_node *val = expression_to_firm(call->arguments->expression);
1674 ir_node *shf = expression_to_firm(call->arguments->next->expression);
1675 ir_mode *mode = get_irn_mode(val);
1676 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1677 ir_node *c = new_Const_long(mode_uint, get_mode_size_bits(mode));
1678 ir_node *sub = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1679 return new_d_Rotl(dbgi, val, sub, mode);
1684 case BUILTIN_LIBC_CHECK:
1685 panic("builtin did not produce an entity");
1687 panic("invalid builtin");
1691 * Transform a call expression.
1692 * Handles some special cases, like alloca() calls, which must be resolved
1693 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1694 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1697 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1699 dbg_info *const dbgi = get_dbg_info(&call->base.pos);
1700 assert(currently_reachable());
1702 expression_t *function = call->function;
1703 ir_node *callee = NULL;
1704 bool firm_builtin = false;
1705 ir_builtin_kind firm_builtin_kind = ir_bk_trap;
1706 if (function->kind == EXPR_REFERENCE) {
1707 const reference_expression_t *ref = &function->reference;
1708 entity_t *entity = ref->entity;
1710 if (entity->kind == ENTITY_FUNCTION) {
1711 builtin_kind_t builtin = entity->function.btk;
1712 if (builtin == BUILTIN_FIRM) {
1713 firm_builtin = true;
1714 firm_builtin_kind = entity->function.b.firm_builtin_kind;
1715 } else if (builtin != BUILTIN_NONE && builtin != BUILTIN_LIBC
1716 && builtin != BUILTIN_LIBC_CHECK) {
1717 return process_builtin_call(call);
1722 callee = expression_to_firm(function);
1724 type_t *type = skip_typeref(function->base.type);
1725 assert(is_type_pointer(type));
1726 pointer_type_t *pointer_type = &type->pointer;
1727 type_t *points_to = skip_typeref(pointer_type->points_to);
1728 assert(is_type_function(points_to));
1729 function_type_t *function_type = &points_to->function;
1731 int n_parameters = 0;
1732 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1733 ir_type *new_method_type = NULL;
1734 if (function_type->variadic || function_type->unspecified_parameters) {
1735 const call_argument_t *argument = call->arguments;
1736 for ( ; argument != NULL; argument = argument->next) {
1740 /* we need to construct a new method type matching the call
1742 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
1743 int n_res = get_method_n_ress(ir_method_type);
1744 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
1745 set_method_calling_convention(new_method_type,
1746 get_method_calling_convention(ir_method_type));
1747 set_method_additional_properties(new_method_type,
1748 get_method_additional_properties(ir_method_type));
1749 set_method_variadicity(new_method_type,
1750 get_method_variadicity(ir_method_type));
1752 for (int i = 0; i < n_res; ++i) {
1753 set_method_res_type(new_method_type, i,
1754 get_method_res_type(ir_method_type, i));
1756 argument = call->arguments;
1757 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1758 expression_t *expression = argument->expression;
1759 ir_type *irtype = get_ir_type(expression->base.type);
1760 set_method_param_type(new_method_type, i, irtype);
1762 ir_method_type = new_method_type;
1764 n_parameters = get_method_n_params(ir_method_type);
1767 ir_node *in[n_parameters];
1769 const call_argument_t *argument = call->arguments;
1770 for (int n = 0; n < n_parameters; ++n) {
1771 expression_t *expression = argument->expression;
1772 ir_node *arg_node = expression_to_firm(expression);
1774 type_t *arg_type = skip_typeref(expression->base.type);
1775 if (!is_type_compound(arg_type)) {
1776 ir_mode *const mode = get_ir_mode_storage(arg_type);
1777 arg_node = create_conv(dbgi, arg_node, mode);
1782 argument = argument->next;
1786 if (function_type->modifiers & DM_CONST) {
1787 store = get_irg_no_mem(current_ir_graph);
1789 store = get_store();
1793 type_t *return_type = skip_typeref(function_type->return_type);
1794 ir_node *result = NULL;
1796 node = new_d_Builtin(dbgi, store, n_parameters, in, firm_builtin_kind,
1798 if (! (function_type->modifiers & DM_CONST)) {
1799 ir_node *mem = new_Proj(node, mode_M, pn_Builtin_M);
1803 if (!is_type_void(return_type)) {
1804 assert(is_type_scalar(return_type));
1805 ir_mode *mode = get_ir_mode_storage(return_type);
1806 result = new_Proj(node, mode, pn_Builtin_max+1);
1807 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1808 result = create_conv(NULL, result, mode_arith);
1811 node = new_d_Call(dbgi, store, callee, n_parameters, in, ir_method_type);
1812 if (! (function_type->modifiers & DM_CONST)) {
1813 ir_node *mem = new_Proj(node, mode_M, pn_Call_M);
1817 if (!is_type_void(return_type)) {
1818 ir_node *const resproj = new_Proj(node, mode_T, pn_Call_T_result);
1819 ir_mode *const mode = get_ir_mode_storage(return_type);
1820 result = new_Proj(resproj, mode, 0);
1821 ir_mode *const mode_arith = get_ir_mode_arithmetic(return_type);
1822 result = create_conv(NULL, result, mode_arith);
1826 if (function_type->modifiers & DM_NORETURN) {
1827 /* A dead end: Keep the Call and the Block. Also place all further
1828 * nodes into a new and unreachable block. */
1830 keep_alive(get_cur_block());
1831 ir_node *block = new_Block(0, NULL);
1832 set_cur_block(block);
1838 static ir_node *statement_to_firm(statement_t *statement);
1839 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1841 static ir_node *expression_to_addr(const expression_t *expression);
1842 static ir_node *create_condition_evaluation(expression_t const *expression, jump_target *true_target, jump_target *false_target);
1844 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1847 if (is_type_scalar(type)) {
1848 ir_mode *mode = get_ir_mode_storage(type);
1849 value = create_conv(dbgi, value, mode);
1852 ir_node *memory = get_store();
1854 if (is_type_scalar(type)) {
1855 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1856 ? cons_volatile : cons_none;
1857 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1858 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1859 set_store(store_mem);
1861 ir_type *irtype = get_ir_type(type);
1862 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1863 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
1864 set_store(copyb_mem);
1868 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1870 ir_tarval *all_one = get_mode_all_one(mode);
1871 int mode_size = get_mode_size_bits(mode);
1872 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1874 assert(offset >= 0);
1876 assert(offset + size <= mode_size);
1877 if (size == mode_size) {
1881 long shiftr = get_mode_size_bits(mode) - size;
1882 long shiftl = offset;
1883 ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1884 ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1885 ir_tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1886 ir_tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1891 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1892 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile,
1895 ir_type *entity_type = get_entity_type(entity);
1896 ir_type *base_type = get_primitive_base_type(entity_type);
1897 ir_mode *mode = get_type_mode(base_type);
1898 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1900 value = create_conv(dbgi, value, mode);
1902 /* kill upper bits of value and shift to right position */
1903 unsigned bitoffset = get_entity_offset_bits_remainder(entity);
1904 unsigned bitsize = get_mode_size_bits(get_type_mode(entity_type));
1905 unsigned base_bits = get_mode_size_bits(mode);
1906 unsigned shiftwidth = base_bits - bitsize;
1908 ir_node *shiftcount = new_Const_long(mode_uint, shiftwidth);
1909 ir_node *shiftl = new_d_Shl(dbgi, value, shiftcount, mode);
1911 unsigned shrwidth = base_bits - bitsize - bitoffset;
1912 ir_node *shrconst = new_Const_long(mode_uint, shrwidth);
1913 ir_node *shiftr = new_d_Shr(dbgi, shiftl, shrconst, mode);
1915 /* load current value */
1916 ir_node *mem = get_store();
1917 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1918 set_volatile ? cons_volatile : cons_none);
1919 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1920 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1921 ir_tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1922 ir_tarval *inv_mask = tarval_not(shift_mask);
1923 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1924 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1926 /* construct new value and store */
1927 ir_node *new_val = new_d_Or(dbgi, load_res_masked, shiftr, mode);
1928 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1929 set_volatile ? cons_volatile : cons_none);
1930 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1931 set_store(store_mem);
1937 ir_node *count_res_shr = new_Const_long(mode_uint, base_bits - bitsize);
1938 if (mode_is_signed(mode)) {
1939 res_shr = new_d_Shrs(dbgi, shiftl, count_res_shr, mode);
1941 res_shr = new_d_Shr(dbgi, shiftl, count_res_shr, mode);
1946 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1949 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
1950 entity_t *entity = expression->compound_entry;
1951 type_t *base_type = entity->declaration.type;
1952 ir_mode *mode = get_ir_mode_storage(base_type);
1953 ir_node *mem = get_store();
1954 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1955 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1956 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1957 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
1959 ir_mode *amode = mode;
1960 /* optimisation, since shifting in modes < machine_size is usually
1962 if (get_mode_size_bits(amode) < get_mode_size_bits(mode_uint)) {
1965 unsigned amode_size = get_mode_size_bits(amode);
1966 load_res = create_conv(dbgi, load_res, amode);
1968 set_store(load_mem);
1970 /* kill upper bits */
1971 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1972 unsigned bitoffset = entity->compound_member.bit_offset;
1973 unsigned bitsize = entity->compound_member.bit_size;
1974 unsigned shift_bitsl = amode_size - bitoffset - bitsize;
1975 ir_tarval *tvl = new_tarval_from_long((long)shift_bitsl, mode_uint);
1976 ir_node *countl = new_d_Const(dbgi, tvl);
1977 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, amode);
1979 unsigned shift_bitsr = bitoffset + shift_bitsl;
1980 assert(shift_bitsr <= amode_size);
1981 ir_tarval *tvr = new_tarval_from_long((long)shift_bitsr, mode_uint);
1982 ir_node *countr = new_d_Const(dbgi, tvr);
1984 if (mode_is_signed(mode)) {
1985 shiftr = new_d_Shrs(dbgi, shiftl, countr, amode);
1987 shiftr = new_d_Shr(dbgi, shiftl, countr, amode);
1990 type_t *type = expression->base.type;
1991 ir_mode *resmode = get_ir_mode_arithmetic(type);
1992 return create_conv(dbgi, shiftr, resmode);
1995 /* make sure the selected compound type is constructed */
1996 static void construct_select_compound(const select_expression_t *expression)
1998 type_t *type = skip_typeref(expression->compound->base.type);
1999 if (is_type_pointer(type)) {
2000 type = type->pointer.points_to;
2002 (void) get_ir_type(type);
2005 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2006 ir_node *value, ir_node *addr)
2008 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2009 type_t *type = skip_typeref(expression->base.type);
2011 if (!is_type_compound(type)) {
2012 ir_mode *mode = get_ir_mode_storage(type);
2013 value = create_conv(dbgi, value, mode);
2016 if (expression->kind == EXPR_REFERENCE) {
2017 const reference_expression_t *ref = &expression->reference;
2019 entity_t *entity = ref->entity;
2020 assert(is_declaration(entity));
2021 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2022 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2023 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2024 set_value(entity->variable.v.value_number, value);
2030 addr = expression_to_addr(expression);
2031 assert(addr != NULL);
2033 if (expression->kind == EXPR_SELECT) {
2034 const select_expression_t *select = &expression->select;
2036 construct_select_compound(select);
2038 entity_t *entity = select->compound_entry;
2039 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2040 if (entity->compound_member.bitfield) {
2041 ir_entity *irentity = entity->compound_member.entity;
2043 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2044 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2045 set_volatile, true);
2050 assign_value(dbgi, addr, type, value);
2054 static void set_value_for_expression(const expression_t *expression,
2057 set_value_for_expression_addr(expression, value, NULL);
2060 static ir_node *get_value_from_lvalue(const expression_t *expression,
2063 if (expression->kind == EXPR_REFERENCE) {
2064 const reference_expression_t *ref = &expression->reference;
2066 entity_t *entity = ref->entity;
2067 assert(entity->kind == ENTITY_VARIABLE
2068 || entity->kind == ENTITY_PARAMETER);
2069 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2071 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE ||
2072 entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2073 value_number = entity->variable.v.value_number;
2074 assert(addr == NULL);
2075 type_t *type = skip_typeref(expression->base.type);
2076 ir_mode *mode = get_ir_mode_storage(type);
2077 ir_node *res = get_value(value_number, mode);
2078 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2082 assert(addr != NULL);
2083 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2086 if (expression->kind == EXPR_SELECT &&
2087 expression->select.compound_entry->compound_member.bitfield) {
2088 construct_select_compound(&expression->select);
2089 value = bitfield_extract_to_firm(&expression->select, addr);
2091 value = deref_address(dbgi, expression->base.type, addr);
2098 static ir_node *create_incdec(const unary_expression_t *expression)
2100 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2101 const expression_t *value_expr = expression->value;
2102 ir_node *addr = expression_to_addr(value_expr);
2103 ir_node *value = get_value_from_lvalue(value_expr, addr);
2105 type_t *type = skip_typeref(expression->base.type);
2106 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2109 if (is_type_pointer(type)) {
2110 pointer_type_t *pointer_type = &type->pointer;
2111 offset = get_type_size_node(pointer_type->points_to);
2113 assert(is_type_arithmetic(type));
2114 offset = new_Const(get_mode_one(mode));
2118 ir_node *store_value;
2119 switch(expression->base.kind) {
2120 case EXPR_UNARY_POSTFIX_INCREMENT:
2122 store_value = new_d_Add(dbgi, value, offset, mode);
2124 case EXPR_UNARY_POSTFIX_DECREMENT:
2126 store_value = new_d_Sub(dbgi, value, offset, mode);
2128 case EXPR_UNARY_PREFIX_INCREMENT:
2129 result = new_d_Add(dbgi, value, offset, mode);
2130 store_value = result;
2132 case EXPR_UNARY_PREFIX_DECREMENT:
2133 result = new_d_Sub(dbgi, value, offset, mode);
2134 store_value = result;
2137 panic("no incdec expr");
2140 set_value_for_expression_addr(value_expr, store_value, addr);
2145 static bool is_local_variable(expression_t *expression)
2147 if (expression->kind != EXPR_REFERENCE)
2149 reference_expression_t *ref_expr = &expression->reference;
2150 entity_t *entity = ref_expr->entity;
2151 if (entity->kind != ENTITY_VARIABLE)
2153 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2154 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2157 static ir_relation get_relation(const expression_kind_t kind)
2160 case EXPR_BINARY_EQUAL: return ir_relation_equal;
2161 case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2162 case EXPR_BINARY_NOTEQUAL: return ir_relation_unordered_less_greater;
2163 case EXPR_BINARY_ISLESS:
2164 case EXPR_BINARY_LESS: return ir_relation_less;
2165 case EXPR_BINARY_ISLESSEQUAL:
2166 case EXPR_BINARY_LESSEQUAL: return ir_relation_less_equal;
2167 case EXPR_BINARY_ISGREATER:
2168 case EXPR_BINARY_GREATER: return ir_relation_greater;
2169 case EXPR_BINARY_ISGREATEREQUAL:
2170 case EXPR_BINARY_GREATEREQUAL: return ir_relation_greater_equal;
2171 case EXPR_BINARY_ISUNORDERED: return ir_relation_unordered;
2176 panic("trying to get ir_relation from non-comparison binexpr type");
2180 * Handle the assume optimizer hint: check if a Confirm
2181 * node can be created.
2183 * @param dbi debug info
2184 * @param expr the IL assume expression
2186 * we support here only some simple cases:
2191 static ir_node *handle_assume_compare(dbg_info *dbi,
2192 const binary_expression_t *expression)
2194 expression_t *op1 = expression->left;
2195 expression_t *op2 = expression->right;
2196 entity_t *var2, *var = NULL;
2197 ir_node *res = NULL;
2198 ir_relation relation = get_relation(expression->base.kind);
2200 if (is_local_variable(op1) && is_local_variable(op2)) {
2201 var = op1->reference.entity;
2202 var2 = op2->reference.entity;
2204 type_t *const type = skip_typeref(var->declaration.type);
2205 ir_mode *const mode = get_ir_mode_storage(type);
2207 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2208 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2210 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2211 set_value(var2->variable.v.value_number, res);
2213 res = new_d_Confirm(dbi, irn1, irn2, relation);
2214 set_value(var->variable.v.value_number, res);
2219 expression_t *con = NULL;
2220 if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2221 var = op1->reference.entity;
2223 } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2224 relation = get_inversed_relation(relation);
2225 var = op2->reference.entity;
2230 type_t *const type = skip_typeref(var->declaration.type);
2231 ir_mode *const mode = get_ir_mode_storage(type);
2233 res = get_value(var->variable.v.value_number, mode);
2234 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2235 set_value(var->variable.v.value_number, res);
2241 * Handle the assume optimizer hint.
2243 * @param dbi debug info
2244 * @param expr the IL assume expression
2246 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2248 switch(expression->kind) {
2249 case EXPR_BINARY_EQUAL:
2250 case EXPR_BINARY_NOTEQUAL:
2251 case EXPR_BINARY_LESS:
2252 case EXPR_BINARY_LESSEQUAL:
2253 case EXPR_BINARY_GREATER:
2254 case EXPR_BINARY_GREATEREQUAL:
2255 return handle_assume_compare(dbi, &expression->binary);
2261 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2262 type_t *from_type, type_t *type)
2264 type = skip_typeref(type);
2265 if (is_type_void(type)) {
2266 /* make sure firm type is constructed */
2267 (void) get_ir_type(type);
2270 if (!is_type_scalar(type)) {
2271 /* make sure firm type is constructed */
2272 (void) get_ir_type(type);
2276 from_type = skip_typeref(from_type);
2277 ir_mode *mode = get_ir_mode_storage(type);
2278 /* check for conversion from / to __based types */
2279 if (is_type_pointer(type) && is_type_pointer(from_type)) {
2280 const variable_t *from_var = from_type->pointer.base_variable;
2281 const variable_t *to_var = type->pointer.base_variable;
2282 if (from_var != to_var) {
2283 if (from_var != NULL) {
2284 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2285 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2286 value_node = new_d_Add(dbgi, value_node, base, mode);
2288 if (to_var != NULL) {
2289 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2290 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2291 value_node = new_d_Sub(dbgi, value_node, base, mode);
2296 if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2297 /* bool adjustments (we save a mode_Bu, but have to temporarily
2298 * convert to mode_b so we only get a 0/1 value */
2299 value_node = create_conv(dbgi, value_node, mode_b);
2302 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2303 ir_node *node = create_conv(dbgi, value_node, mode);
2304 node = create_conv(dbgi, node, mode_arith);
2309 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2311 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2312 type_t *type = skip_typeref(expression->base.type);
2314 const expression_t *value = expression->value;
2316 switch(expression->base.kind) {
2317 case EXPR_UNARY_TAKE_ADDRESS:
2318 return expression_to_addr(value);
2320 case EXPR_UNARY_NEGATE: {
2321 ir_node *value_node = expression_to_firm(value);
2322 ir_mode *mode = get_ir_mode_arithmetic(type);
2323 return new_d_Minus(dbgi, value_node, mode);
2325 case EXPR_UNARY_PLUS:
2326 return expression_to_firm(value);
2327 case EXPR_UNARY_BITWISE_NEGATE: {
2328 ir_node *value_node = expression_to_firm(value);
2329 ir_mode *mode = get_ir_mode_arithmetic(type);
2330 return new_d_Not(dbgi, value_node, mode);
2332 case EXPR_UNARY_NOT: {
2333 ir_node *value_node = _expression_to_firm(value);
2334 value_node = create_conv(dbgi, value_node, mode_b);
2335 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2338 case EXPR_UNARY_DEREFERENCE: {
2339 ir_node *value_node = expression_to_firm(value);
2340 type_t *value_type = skip_typeref(value->base.type);
2341 assert(is_type_pointer(value_type));
2343 /* check for __based */
2344 const variable_t *const base_var = value_type->pointer.base_variable;
2345 if (base_var != NULL) {
2346 ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2347 ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2348 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2350 type_t *points_to = value_type->pointer.points_to;
2351 return deref_address(dbgi, points_to, value_node);
2353 case EXPR_UNARY_POSTFIX_INCREMENT:
2354 case EXPR_UNARY_POSTFIX_DECREMENT:
2355 case EXPR_UNARY_PREFIX_INCREMENT:
2356 case EXPR_UNARY_PREFIX_DECREMENT:
2357 return create_incdec(expression);
2358 case EXPR_UNARY_CAST: {
2359 ir_node *value_node = expression_to_firm(value);
2360 type_t *from_type = value->base.type;
2361 return create_cast(dbgi, value_node, from_type, type);
2363 case EXPR_UNARY_ASSUME:
2364 return handle_assume(dbgi, value);
2369 panic("invalid unary expression type");
2373 * produces a 0/1 depending of the value of a mode_b node
2375 static ir_node *produce_condition_result(const expression_t *expression,
2376 ir_mode *mode, dbg_info *dbgi)
2378 jump_target true_target;
2379 jump_target false_target;
2380 init_jump_target(&true_target, NULL);
2381 init_jump_target(&false_target, NULL);
2382 create_condition_evaluation(expression, &true_target, &false_target);
2384 ir_node *val = NULL;
2385 jump_target exit_target;
2386 init_jump_target(&exit_target, NULL);
2388 if (enter_jump_target(&true_target)) {
2389 val = new_Const(get_mode_one(mode));
2390 jump_to_target(&exit_target);
2393 if (enter_jump_target(&false_target)) {
2394 ir_node *const zero = new_Const(get_mode_null(mode));
2395 jump_to_target(&exit_target);
2397 ir_node *const in[] = { val, zero };
2398 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, mode);
2404 if (!enter_jump_target(&exit_target)) {
2405 set_cur_block(new_Block(0, NULL));
2406 val = new_Unknown(mode);
2411 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2412 ir_node *value, type_t *type)
2414 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2415 assert(is_type_pointer(type));
2416 pointer_type_t *const pointer_type = &type->pointer;
2417 type_t *const points_to = skip_typeref(pointer_type->points_to);
2418 ir_node * elem_size = get_type_size_node(points_to);
2419 elem_size = create_conv(dbgi, elem_size, mode);
2420 value = create_conv(dbgi, value, mode);
2421 ir_node *const mul = new_d_Mul(dbgi, value, elem_size, mode);
2425 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2426 ir_node *left, ir_node *right)
2429 type_t *type_left = skip_typeref(expression->left->base.type);
2430 type_t *type_right = skip_typeref(expression->right->base.type);
2432 expression_kind_t kind = expression->base.kind;
2435 case EXPR_BINARY_SHIFTLEFT:
2436 case EXPR_BINARY_SHIFTRIGHT:
2437 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2438 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2439 mode = get_ir_mode_arithmetic(expression->base.type);
2440 right = create_conv(dbgi, right, atomic_modes[ATOMIC_TYPE_UINT]);
2443 case EXPR_BINARY_SUB:
2444 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2445 const pointer_type_t *const ptr_type = &type_left->pointer;
2447 mode = get_ir_mode_arithmetic(expression->base.type);
2448 ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2449 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2450 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2451 ir_node *const no_mem = new_NoMem();
2452 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2453 mode, op_pin_state_floats);
2454 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2457 case EXPR_BINARY_SUB_ASSIGN:
2458 if (is_type_pointer(type_left)) {
2459 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2460 mode = get_ir_mode_arithmetic(type_left);
2465 case EXPR_BINARY_ADD:
2466 case EXPR_BINARY_ADD_ASSIGN:
2467 if (is_type_pointer(type_left)) {
2468 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2469 mode = get_ir_mode_arithmetic(type_left);
2471 } else if (is_type_pointer(type_right)) {
2472 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2473 mode = get_ir_mode_arithmetic(type_right);
2480 mode = get_ir_mode_arithmetic(type_right);
2481 left = create_conv(dbgi, left, mode);
2486 case EXPR_BINARY_ADD_ASSIGN:
2487 case EXPR_BINARY_ADD:
2488 return new_d_Add(dbgi, left, right, mode);
2489 case EXPR_BINARY_SUB_ASSIGN:
2490 case EXPR_BINARY_SUB:
2491 return new_d_Sub(dbgi, left, right, mode);
2492 case EXPR_BINARY_MUL_ASSIGN:
2493 case EXPR_BINARY_MUL:
2494 return new_d_Mul(dbgi, left, right, mode);
2495 case EXPR_BINARY_BITWISE_AND:
2496 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2497 return new_d_And(dbgi, left, right, mode);
2498 case EXPR_BINARY_BITWISE_OR:
2499 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2500 return new_d_Or(dbgi, left, right, mode);
2501 case EXPR_BINARY_BITWISE_XOR:
2502 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2503 return new_d_Eor(dbgi, left, right, mode);
2504 case EXPR_BINARY_SHIFTLEFT:
2505 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2506 return new_d_Shl(dbgi, left, right, mode);
2507 case EXPR_BINARY_SHIFTRIGHT:
2508 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2509 if (mode_is_signed(mode)) {
2510 return new_d_Shrs(dbgi, left, right, mode);
2512 return new_d_Shr(dbgi, left, right, mode);
2514 case EXPR_BINARY_DIV:
2515 case EXPR_BINARY_DIV_ASSIGN: {
2516 ir_node *pin = new_Pin(new_NoMem());
2517 ir_node *op = new_d_Div(dbgi, pin, left, right, mode,
2518 op_pin_state_floats);
2519 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2522 case EXPR_BINARY_MOD:
2523 case EXPR_BINARY_MOD_ASSIGN: {
2524 ir_node *pin = new_Pin(new_NoMem());
2525 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2526 op_pin_state_floats);
2527 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2531 panic("unexpected expression kind");
2535 static ir_node *create_lazy_op(const binary_expression_t *expression)
2537 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2538 type_t *type = skip_typeref(expression->base.type);
2539 ir_mode *mode = get_ir_mode_arithmetic(type);
2541 if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2542 bool val = fold_constant_to_bool(expression->left);
2543 expression_kind_t ekind = expression->base.kind;
2544 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2545 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2547 return new_Const(get_mode_null(mode));
2551 return new_Const(get_mode_one(mode));
2555 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2556 bool valr = fold_constant_to_bool(expression->right);
2557 return create_Const_from_bool(mode, valr);
2560 return produce_condition_result(expression->right, mode, dbgi);
2563 return produce_condition_result((const expression_t*) expression, mode,
2567 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2568 ir_node *right, ir_mode *mode);
2570 static ir_node *create_assign_binop(const binary_expression_t *expression)
2572 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2573 const expression_t *left_expr = expression->left;
2574 type_t *type = skip_typeref(left_expr->base.type);
2575 ir_node *right = expression_to_firm(expression->right);
2576 ir_node *left_addr = expression_to_addr(left_expr);
2577 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2578 ir_node *result = create_op(dbgi, expression, left, right);
2580 result = create_cast(dbgi, result, expression->right->base.type, type);
2582 result = set_value_for_expression_addr(left_expr, result, left_addr);
2584 if (!is_type_compound(type)) {
2585 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2586 result = create_conv(dbgi, result, mode_arithmetic);
2591 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2593 expression_kind_t kind = expression->base.kind;
2596 case EXPR_BINARY_EQUAL:
2597 case EXPR_BINARY_NOTEQUAL:
2598 case EXPR_BINARY_LESS:
2599 case EXPR_BINARY_LESSEQUAL:
2600 case EXPR_BINARY_GREATER:
2601 case EXPR_BINARY_GREATEREQUAL:
2602 case EXPR_BINARY_ISGREATER:
2603 case EXPR_BINARY_ISGREATEREQUAL:
2604 case EXPR_BINARY_ISLESS:
2605 case EXPR_BINARY_ISLESSEQUAL:
2606 case EXPR_BINARY_ISLESSGREATER:
2607 case EXPR_BINARY_ISUNORDERED: {
2608 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2609 ir_node *left = expression_to_firm(expression->left);
2610 ir_node *right = expression_to_firm(expression->right);
2611 ir_relation relation = get_relation(kind);
2612 ir_node *cmp = new_d_Cmp(dbgi, left, right, relation);
2615 case EXPR_BINARY_ASSIGN: {
2616 ir_node *addr = expression_to_addr(expression->left);
2617 ir_node *right = expression_to_firm(expression->right);
2619 = set_value_for_expression_addr(expression->left, right, addr);
2621 type_t *type = skip_typeref(expression->base.type);
2622 if (!is_type_compound(type)) {
2623 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2624 res = create_conv(NULL, res, mode_arithmetic);
2628 case EXPR_BINARY_ADD:
2629 case EXPR_BINARY_SUB:
2630 case EXPR_BINARY_MUL:
2631 case EXPR_BINARY_DIV:
2632 case EXPR_BINARY_MOD:
2633 case EXPR_BINARY_BITWISE_AND:
2634 case EXPR_BINARY_BITWISE_OR:
2635 case EXPR_BINARY_BITWISE_XOR:
2636 case EXPR_BINARY_SHIFTLEFT:
2637 case EXPR_BINARY_SHIFTRIGHT:
2639 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2640 ir_node *left = expression_to_firm(expression->left);
2641 ir_node *right = expression_to_firm(expression->right);
2642 return create_op(dbgi, expression, left, right);
2644 case EXPR_BINARY_LOGICAL_AND:
2645 case EXPR_BINARY_LOGICAL_OR:
2646 return create_lazy_op(expression);
2647 case EXPR_BINARY_COMMA:
2648 /* create side effects of left side */
2649 (void) expression_to_firm(expression->left);
2650 return _expression_to_firm(expression->right);
2652 case EXPR_BINARY_ADD_ASSIGN:
2653 case EXPR_BINARY_SUB_ASSIGN:
2654 case EXPR_BINARY_MUL_ASSIGN:
2655 case EXPR_BINARY_MOD_ASSIGN:
2656 case EXPR_BINARY_DIV_ASSIGN:
2657 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2658 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2659 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2660 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2661 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2662 return create_assign_binop(expression);
2664 panic("invalid binexpr type");
2668 static ir_node *array_access_addr(const array_access_expression_t *expression)
2670 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2671 ir_node *base_addr = expression_to_firm(expression->array_ref);
2672 ir_node *offset = expression_to_firm(expression->index);
2673 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2674 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2675 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2680 static ir_node *array_access_to_firm(
2681 const array_access_expression_t *expression)
2683 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2684 ir_node *addr = array_access_addr(expression);
2685 type_t *type = revert_automatic_type_conversion(
2686 (const expression_t*) expression);
2687 type = skip_typeref(type);
2689 return deref_address(dbgi, type, addr);
2692 static long get_offsetof_offset(const offsetof_expression_t *expression)
2694 type_t *orig_type = expression->type;
2697 designator_t *designator = expression->designator;
2698 for ( ; designator != NULL; designator = designator->next) {
2699 type_t *type = skip_typeref(orig_type);
2700 /* be sure the type is constructed */
2701 (void) get_ir_type(type);
2703 if (designator->symbol != NULL) {
2704 assert(is_type_compound(type));
2705 symbol_t *symbol = designator->symbol;
2707 compound_t *compound = type->compound.compound;
2708 entity_t *iter = compound->members.entities;
2709 for (; iter->base.symbol != symbol; iter = iter->base.next) {}
2711 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2712 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2713 offset += get_entity_offset(iter->compound_member.entity);
2715 orig_type = iter->declaration.type;
2717 expression_t *array_index = designator->array_index;
2718 assert(designator->array_index != NULL);
2719 assert(is_type_array(type));
2721 long index = fold_constant_to_int(array_index);
2722 ir_type *arr_type = get_ir_type(type);
2723 ir_type *elem_type = get_array_element_type(arr_type);
2724 long elem_size = get_type_size_bytes(elem_type);
2726 offset += index * elem_size;
2728 orig_type = type->array.element_type;
2735 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2737 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2738 long offset = get_offsetof_offset(expression);
2739 ir_tarval *tv = new_tarval_from_long(offset, mode);
2740 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2742 return new_d_Const(dbgi, tv);
2745 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2746 ir_entity *entity, type_t *type);
2747 static ir_initializer_t *create_ir_initializer(
2748 const initializer_t *initializer, type_t *type);
2750 static ir_entity *create_initializer_entity(dbg_info *dbgi,
2751 initializer_t *initializer,
2754 /* create the ir_initializer */
2755 PUSH_IRG(get_const_code_irg());
2756 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
2759 ident *const id = id_unique("initializer.%u");
2760 ir_type *const irtype = get_ir_type(type);
2761 ir_type *const global_type = get_glob_type();
2762 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
2763 set_entity_ld_ident(entity, id);
2764 set_entity_visibility(entity, ir_visibility_private);
2765 add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
2766 set_entity_initializer(entity, irinitializer);
2770 static ir_node *compound_literal_addr(compound_literal_expression_t const *const expression)
2772 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2773 type_t *type = expression->type;
2774 initializer_t *initializer = expression->initializer;
2776 if (expression->global_scope ||
2777 ((type->base.qualifiers & TYPE_QUALIFIER_CONST)
2778 && is_constant_initializer(initializer) == EXPR_CLASS_CONSTANT)) {
2779 ir_entity *entity = create_initializer_entity(dbgi, initializer, type);
2780 return create_symconst(dbgi, entity);
2782 /* create an entity on the stack */
2783 ident *const id = id_unique("CompLit.%u");
2784 ir_type *const irtype = get_ir_type(type);
2785 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2787 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2788 set_entity_ld_ident(entity, id);
2790 /* create initialisation code */
2791 create_local_initializer(initializer, dbgi, entity, type);
2793 /* create a sel for the compound literal address */
2794 ir_node *frame = get_irg_frame(current_ir_graph);
2795 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2800 static ir_node *compound_literal_to_firm(compound_literal_expression_t const* const expr)
2802 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
2803 type_t *const type = expr->type;
2804 ir_node *const addr = compound_literal_addr(expr);
2805 return deref_address(dbgi, type, addr);
2809 * Transform a sizeof expression into Firm code.
2811 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2813 type_t *const type = skip_typeref(expression->type);
2814 /* ยง6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2815 if (is_type_array(type) && type->array.is_vla
2816 && expression->tp_expression != NULL) {
2817 expression_to_firm(expression->tp_expression);
2820 return get_type_size_node(type);
2823 static entity_t *get_expression_entity(const expression_t *expression)
2825 if (expression->kind != EXPR_REFERENCE)
2828 return expression->reference.entity;
2831 static unsigned get_cparser_entity_alignment(const entity_t *entity)
2833 switch(entity->kind) {
2834 case DECLARATION_KIND_CASES:
2835 return entity->declaration.alignment;
2838 return entity->compound.alignment;
2839 case ENTITY_TYPEDEF:
2840 return entity->typedefe.alignment;
2848 * Transform an alignof expression into Firm code.
2850 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2852 unsigned alignment = 0;
2854 const expression_t *tp_expression = expression->tp_expression;
2855 if (tp_expression != NULL) {
2856 entity_t *entity = get_expression_entity(tp_expression);
2857 if (entity != NULL) {
2858 alignment = get_cparser_entity_alignment(entity);
2862 if (alignment == 0) {
2863 type_t *type = expression->type;
2864 alignment = get_type_alignment(type);
2867 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2868 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2869 ir_tarval *tv = new_tarval_from_long(alignment, mode);
2870 return new_d_Const(dbgi, tv);
2873 static void init_ir_types(void);
2875 ir_tarval *fold_constant_to_tarval(const expression_t *expression)
2877 assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
2879 bool constant_folding_old = constant_folding;
2880 constant_folding = true;
2881 int old_optimize = get_optimize();
2882 int old_constant_folding = get_opt_constant_folding();
2884 set_opt_constant_folding(1);
2888 PUSH_IRG(get_const_code_irg());
2889 ir_node *const cnst = _expression_to_firm(expression);
2892 set_optimize(old_optimize);
2893 set_opt_constant_folding(old_constant_folding);
2895 if (!is_Const(cnst)) {
2896 panic("couldn't fold constant");
2899 constant_folding = constant_folding_old;
2901 ir_tarval *const tv = get_Const_tarval(cnst);
2902 ir_mode *const mode = get_ir_mode_arithmetic(skip_typeref(expression->base.type));
2903 return tarval_convert_to(tv, mode);
2906 /* this function is only used in parser.c, but it relies on libfirm functionality */
2907 bool constant_is_negative(const expression_t *expression)
2909 ir_tarval *tv = fold_constant_to_tarval(expression);
2910 return tarval_is_negative(tv);
2913 long fold_constant_to_int(const expression_t *expression)
2915 ir_tarval *tv = fold_constant_to_tarval(expression);
2916 if (!tarval_is_long(tv)) {
2917 panic("result of constant folding is not integer");
2920 return get_tarval_long(tv);
2923 bool fold_constant_to_bool(const expression_t *expression)
2925 ir_tarval *tv = fold_constant_to_tarval(expression);
2926 return !tarval_is_null(tv);
2929 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2931 /* first try to fold a constant condition */
2932 if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
2933 bool val = fold_constant_to_bool(expression->condition);
2935 expression_t *true_expression = expression->true_expression;
2936 if (true_expression == NULL)
2937 true_expression = expression->condition;
2938 return expression_to_firm(true_expression);
2940 return expression_to_firm(expression->false_expression);
2944 jump_target true_target;
2945 jump_target false_target;
2946 init_jump_target(&true_target, NULL);
2947 init_jump_target(&false_target, NULL);
2948 ir_node *const cond_expr = create_condition_evaluation(expression->condition, &true_target, &false_target);
2950 ir_node *val = NULL;
2951 jump_target exit_target;
2952 init_jump_target(&exit_target, NULL);
2954 if (enter_jump_target(&true_target)) {
2955 if (expression->true_expression) {
2956 val = expression_to_firm(expression->true_expression);
2957 } else if (cond_expr && get_irn_mode(cond_expr) != mode_b) {
2960 /* Condition ended with a short circuit (&&, ||, !) operation or a
2961 * comparison. Generate a "1" as value for the true branch. */
2962 val = new_Const(get_mode_one(mode_Is));
2964 jump_to_target(&exit_target);
2967 if (enter_jump_target(&false_target)) {
2968 ir_node *const false_val = expression_to_firm(expression->false_expression);
2969 jump_to_target(&exit_target);
2971 ir_node *const in[] = { val, false_val };
2972 dbg_info *const dbgi = get_dbg_info(&expression->base.pos);
2973 val = new_rd_Phi(dbgi, exit_target.block, lengthof(in), in, get_irn_mode(val));
2979 if (!enter_jump_target(&exit_target)) {
2980 set_cur_block(new_Block(0, NULL));
2981 type_t *const type = skip_typeref(expression->base.type);
2982 if (!is_type_void(type))
2983 val = new_Unknown(get_ir_mode_arithmetic(type));
2989 * Returns an IR-node representing the address of a field.
2991 static ir_node *select_addr(const select_expression_t *expression)
2993 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
2995 construct_select_compound(expression);
2997 ir_node *compound_addr = expression_to_firm(expression->compound);
2999 entity_t *entry = expression->compound_entry;
3000 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3001 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3003 if (constant_folding) {
3004 ir_mode *mode = get_irn_mode(compound_addr);
3005 ir_mode *mode_uint = get_reference_mode_unsigned_eq(mode);
3006 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
3007 return new_d_Add(dbgi, compound_addr, ofs, mode);
3009 ir_entity *irentity = entry->compound_member.entity;
3010 assert(irentity != NULL);
3011 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3015 static ir_node *select_to_firm(const select_expression_t *expression)
3017 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3018 ir_node *addr = select_addr(expression);
3019 type_t *type = revert_automatic_type_conversion(
3020 (const expression_t*) expression);
3021 type = skip_typeref(type);
3023 entity_t *entry = expression->compound_entry;
3024 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3026 if (entry->compound_member.bitfield) {
3027 return bitfield_extract_to_firm(expression, addr);
3030 return deref_address(dbgi, type, addr);
3033 /* Values returned by __builtin_classify_type. */
3034 typedef enum gcc_type_class
3040 enumeral_type_class,
3043 reference_type_class,
3047 function_type_class,
3058 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3060 type_t *type = expr->type_expression->base.type;
3062 /* FIXME gcc returns different values depending on whether compiling C or C++
3063 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3066 type = skip_typeref(type);
3067 switch (type->kind) {
3069 const atomic_type_t *const atomic_type = &type->atomic;
3070 switch (atomic_type->akind) {
3071 /* gcc cannot do that */
3072 case ATOMIC_TYPE_VOID:
3073 tc = void_type_class;
3076 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
3077 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
3078 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
3079 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3080 case ATOMIC_TYPE_SHORT:
3081 case ATOMIC_TYPE_USHORT:
3082 case ATOMIC_TYPE_INT:
3083 case ATOMIC_TYPE_UINT:
3084 case ATOMIC_TYPE_LONG:
3085 case ATOMIC_TYPE_ULONG:
3086 case ATOMIC_TYPE_LONGLONG:
3087 case ATOMIC_TYPE_ULONGLONG:
3088 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3089 tc = integer_type_class;
3092 case ATOMIC_TYPE_FLOAT:
3093 case ATOMIC_TYPE_DOUBLE:
3094 case ATOMIC_TYPE_LONG_DOUBLE:
3095 tc = real_type_class;
3098 panic("Unexpected atomic type.");
3101 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3102 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3103 case TYPE_ARRAY: /* gcc handles this as pointer */
3104 case TYPE_FUNCTION: /* gcc handles this as pointer */
3105 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3106 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3107 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3109 /* gcc handles this as integer */
3110 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3112 /* gcc classifies the referenced type */
3113 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3115 /* typedef/typeof should be skipped already */
3121 panic("unexpected type.");
3125 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3126 ir_mode *const mode = atomic_modes[ATOMIC_TYPE_INT];
3127 ir_tarval *const tv = new_tarval_from_long(tc, mode);
3128 return new_d_Const(dbgi, tv);
3131 static ir_node *function_name_to_firm(
3132 const funcname_expression_t *const expr)
3134 switch(expr->kind) {
3135 case FUNCNAME_FUNCTION:
3136 case FUNCNAME_PRETTY_FUNCTION:
3137 case FUNCNAME_FUNCDNAME:
3138 if (current_function_name == NULL) {
3139 position_t const *const src_pos = &expr->base.pos;
3140 char const *const name = current_function_entity->base.symbol->string;
3141 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3142 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3144 return current_function_name;
3145 case FUNCNAME_FUNCSIG:
3146 if (current_funcsig == NULL) {
3147 position_t const *const src_pos = &expr->base.pos;
3148 ir_entity *const ent = get_irg_entity(current_ir_graph);
3149 char const *const name = get_entity_ld_name(ent);
3150 string_t const string = { name, strlen(name), STRING_ENCODING_CHAR };
3151 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3153 return current_funcsig;
3155 panic("Unsupported function name");
3158 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3160 statement_t *statement = expr->statement;
3162 assert(statement->kind == STATEMENT_COMPOUND);
3163 return compound_statement_to_firm(&statement->compound);
3166 static ir_node *va_start_expression_to_firm(
3167 const va_start_expression_t *const expr)
3169 ir_entity *param_ent = current_vararg_entity;
3170 if (param_ent == NULL) {
3171 size_t const n = IR_VA_START_PARAMETER_NUMBER;
3172 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
3173 ir_type *const param_type = get_unknown_type();
3174 param_ent = new_parameter_entity(frame_type, n, param_type);
3175 current_vararg_entity = param_ent;
3178 ir_node *const frame = get_irg_frame(current_ir_graph);
3179 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3180 ir_node *const no_mem = new_NoMem();
3181 ir_node *const arg_sel = new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3183 set_value_for_expression(expr->ap, arg_sel);
3188 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3190 type_t *const type = expr->base.type;
3191 expression_t *const ap_expr = expr->ap;
3192 ir_node *const ap_addr = expression_to_addr(ap_expr);
3193 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3194 dbg_info *const dbgi = get_dbg_info(&expr->base.pos);
3195 ir_node *const res = deref_address(dbgi, type, ap);
3197 ir_node *const cnst = get_type_size_node(expr->base.type);
3198 ir_mode *const mode = get_irn_mode(cnst);
3199 ir_node *const c1 = new_Const_long(mode, stack_param_align - 1);
3200 ir_node *const c2 = new_d_Add(dbgi, cnst, c1, mode);
3201 ir_node *const c3 = new_Const_long(mode, -(long)stack_param_align);
3202 ir_node *const c4 = new_d_And(dbgi, c2, c3, mode);
3203 ir_node *const add = new_d_Add(dbgi, ap, c4, mode_P_data);
3205 set_value_for_expression_addr(ap_expr, add, ap_addr);
3211 * Generate Firm for a va_copy expression.
3213 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3215 ir_node *const src = expression_to_firm(expr->src);
3216 set_value_for_expression(expr->dst, src);
3220 static ir_node *dereference_addr(const unary_expression_t *const expression)
3222 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3223 return expression_to_firm(expression->value);
3227 * Returns a IR-node representing an lvalue of the given expression.
3229 static ir_node *expression_to_addr(const expression_t *expression)
3231 switch(expression->kind) {
3232 case EXPR_ARRAY_ACCESS:
3233 return array_access_addr(&expression->array_access);
3235 return call_expression_to_firm(&expression->call);
3236 case EXPR_COMPOUND_LITERAL:
3237 return compound_literal_addr(&expression->compound_literal);
3238 case EXPR_REFERENCE:
3239 return reference_addr(&expression->reference);
3241 return select_addr(&expression->select);
3242 case EXPR_UNARY_DEREFERENCE:
3243 return dereference_addr(&expression->unary);
3247 panic("trying to get address of non-lvalue");
3250 static ir_node *builtin_constant_to_firm(
3251 const builtin_constant_expression_t *expression)
3253 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3254 bool const v = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3255 return create_Const_from_bool(mode, v);
3258 static ir_node *builtin_types_compatible_to_firm(
3259 const builtin_types_compatible_expression_t *expression)
3261 type_t *const left = get_unqualified_type(skip_typeref(expression->left));
3262 type_t *const right = get_unqualified_type(skip_typeref(expression->right));
3263 bool const value = types_compatible(left, right);
3264 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3265 return create_Const_from_bool(mode, value);
3268 static void prepare_label_target(label_t *const label)
3270 if (label->address_taken && !label->indirect_block) {
3271 ir_node *const iblock = new_immBlock();
3272 label->indirect_block = iblock;
3273 ARR_APP1(ir_node*, ijmp_blocks, iblock);
3274 jump_from_block_to_target(&label->target, iblock);
3279 * Pointer to a label. This is used for the
3280 * GNU address-of-label extension.
3282 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3284 /* Beware: Might be called from create initializer with current_ir_graph
3285 * set to const_code_irg. */
3286 PUSH_IRG(current_function);
3287 prepare_label_target(label->label);
3290 symconst_symbol value;
3291 value.entity_p = create_Block_entity(label->label->indirect_block);
3292 dbg_info *const dbgi = get_dbg_info(&label->base.pos);
3293 return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3297 * creates firm nodes for an expression. The difference between this function
3298 * and expression_to_firm is, that this version might produce mode_b nodes
3299 * instead of mode_Is.
3301 static ir_node *_expression_to_firm(expression_t const *const expr)
3304 if (!constant_folding) {
3305 assert(!expr->base.transformed);
3306 ((expression_t*)expr)->base.transformed = true;
3310 switch (expr->kind) {
3311 case EXPR_ALIGNOF: return alignof_to_firm( &expr->typeprop);
3312 case EXPR_ARRAY_ACCESS: return array_access_to_firm( &expr->array_access);
3313 case EXPR_BINARY_CASES: return binary_expression_to_firm( &expr->binary);
3314 case EXPR_BUILTIN_CONSTANT_P: return builtin_constant_to_firm( &expr->builtin_constant);
3315 case EXPR_BUILTIN_TYPES_COMPATIBLE_P: return builtin_types_compatible_to_firm(&expr->builtin_types_compatible);
3316 case EXPR_CALL: return call_expression_to_firm( &expr->call);
3317 case EXPR_CLASSIFY_TYPE: return classify_type_to_firm( &expr->classify_type);
3318 case EXPR_COMPOUND_LITERAL: return compound_literal_to_firm( &expr->compound_literal);
3319 case EXPR_CONDITIONAL: return conditional_to_firm( &expr->conditional);
3320 case EXPR_FUNCNAME: return function_name_to_firm( &expr->funcname);
3321 case EXPR_LABEL_ADDRESS: return label_address_to_firm( &expr->label_address);
3322 case EXPR_LITERAL_CASES: return literal_to_firm( &expr->literal);
3323 case EXPR_LITERAL_CHARACTER: return char_literal_to_firm( &expr->string_literal);
3324 case EXPR_OFFSETOF: return offsetof_to_firm( &expr->offsetofe);
3325 case EXPR_REFERENCE: return reference_expression_to_firm( &expr->reference);
3326 case EXPR_ENUM_CONSTANT: return enum_constant_to_firm( &expr->reference);
3327 case EXPR_SELECT: return select_to_firm( &expr->select);
3328 case EXPR_SIZEOF: return sizeof_to_firm( &expr->typeprop);
3329 case EXPR_STATEMENT: return statement_expression_to_firm( &expr->statement);
3330 case EXPR_UNARY_CASES: return unary_expression_to_firm( &expr->unary);
3331 case EXPR_VA_ARG: return va_arg_expression_to_firm( &expr->va_arge);
3332 case EXPR_VA_COPY: return va_copy_expression_to_firm( &expr->va_copye);
3333 case EXPR_VA_START: return va_start_expression_to_firm( &expr->va_starte);
3335 case EXPR_STRING_LITERAL: return string_to_firm(&expr->base.pos, "str.%u", &expr->string_literal.value);
3337 case EXPR_ERROR: break;
3339 panic("invalid expression");
3343 * Check if a given expression is a GNU __builtin_expect() call.
3345 static bool is_builtin_expect(const expression_t *expression)
3347 if (expression->kind != EXPR_CALL)
3350 expression_t *function = expression->call.function;
3351 if (function->kind != EXPR_REFERENCE)
3353 reference_expression_t *ref = &function->reference;
3354 if (ref->entity->kind != ENTITY_FUNCTION ||
3355 ref->entity->function.btk != BUILTIN_EXPECT)
3361 static bool produces_mode_b(const expression_t *expression)
3363 switch (expression->kind) {
3364 case EXPR_BINARY_EQUAL:
3365 case EXPR_BINARY_NOTEQUAL:
3366 case EXPR_BINARY_LESS:
3367 case EXPR_BINARY_LESSEQUAL:
3368 case EXPR_BINARY_GREATER:
3369 case EXPR_BINARY_GREATEREQUAL:
3370 case EXPR_BINARY_ISGREATER:
3371 case EXPR_BINARY_ISGREATEREQUAL:
3372 case EXPR_BINARY_ISLESS:
3373 case EXPR_BINARY_ISLESSEQUAL:
3374 case EXPR_BINARY_ISLESSGREATER:
3375 case EXPR_BINARY_ISUNORDERED:
3376 case EXPR_UNARY_NOT:
3380 if (is_builtin_expect(expression)) {
3381 expression_t *argument = expression->call.arguments->expression;
3382 return produces_mode_b(argument);
3385 case EXPR_BINARY_COMMA:
3386 return produces_mode_b(expression->binary.right);
3393 static ir_node *expression_to_firm(const expression_t *expression)
3395 if (!produces_mode_b(expression)) {
3396 ir_node *res = _expression_to_firm(expression);
3397 assert(res == NULL || get_irn_mode(res) != mode_b);
3401 if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3402 return new_Const(fold_constant_to_tarval(expression));
3405 /* we have to produce a 0/1 from the mode_b expression */
3406 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3407 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3408 return produce_condition_result(expression, mode, dbgi);
3412 * create a short-circuit expression evaluation that tries to construct
3413 * efficient control flow structures for &&, || and ! expressions
3415 static ir_node *create_condition_evaluation(expression_t const *const expression, jump_target *const true_target, jump_target *const false_target)
3417 switch(expression->kind) {
3418 case EXPR_UNARY_NOT: {
3419 const unary_expression_t *unary_expression = &expression->unary;
3420 create_condition_evaluation(unary_expression->value, false_target, true_target);
3423 case EXPR_BINARY_LOGICAL_AND: {
3424 jump_target extra_target;
3425 init_jump_target(&extra_target, NULL);
3426 create_condition_evaluation(expression->binary.left, &extra_target, false_target);
3427 if (enter_jump_target(&extra_target))
3428 create_condition_evaluation(expression->binary.right, true_target, false_target);
3431 case EXPR_BINARY_LOGICAL_OR: {
3432 jump_target extra_target;
3433 init_jump_target(&extra_target, NULL);
3434 create_condition_evaluation(expression->binary.left, true_target, &extra_target);
3435 if (enter_jump_target(&extra_target))
3436 create_condition_evaluation(expression->binary.right, true_target, false_target);
3443 ir_node *cond_expr = _expression_to_firm(expression);
3444 if (is_Const(cond_expr)) {
3445 if (tarval_is_null(get_Const_tarval(cond_expr))) {
3446 jump_to_target(false_target);
3448 jump_to_target(true_target);
3451 dbg_info *dbgi = get_dbg_info(&expression->base.pos);
3452 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3453 ir_node *cond = new_d_Cond(dbgi, condition);
3454 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3455 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3457 /* set branch prediction info based on __builtin_expect */
3458 if (is_builtin_expect(expression) && is_Cond(cond)) {
3459 call_argument_t *argument = expression->call.arguments->next;
3460 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3461 bool const cnst = fold_constant_to_bool(argument->expression);
3462 cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3463 set_Cond_jmp_pred(cond, pred);
3467 add_pred_to_jump_target(true_target, true_proj);
3468 add_pred_to_jump_target(false_target, false_proj);
3470 set_unreachable_now();
3474 static void create_variable_entity(entity_t *variable,
3475 declaration_kind_t declaration_kind,
3476 ir_type *parent_type)
3478 assert(variable->kind == ENTITY_VARIABLE);
3479 type_t *type = skip_typeref(variable->declaration.type);
3481 ident *const id = new_id_from_str(variable->base.symbol->string);
3482 ir_type *const irtype = get_ir_type(type);
3483 dbg_info *const dbgi = get_dbg_info(&variable->base.pos);
3484 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3485 unsigned alignment = variable->declaration.alignment;
3487 set_entity_alignment(irentity, alignment);
3489 handle_decl_modifiers(irentity, variable);
3491 variable->declaration.kind = (unsigned char) declaration_kind;
3492 variable->variable.v.entity = irentity;
3493 set_entity_ld_ident(irentity, create_ld_ident(variable));
3495 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3496 set_entity_volatility(irentity, volatility_is_volatile);
3501 typedef struct type_path_entry_t type_path_entry_t;
3502 struct type_path_entry_t {
3504 ir_initializer_t *initializer;
3506 entity_t *compound_entry;
3509 typedef struct type_path_t type_path_t;
3510 struct type_path_t {
3511 type_path_entry_t *path;
3516 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3518 size_t len = ARR_LEN(path->path);
3520 for (size_t i = 0; i < len; ++i) {
3521 const type_path_entry_t *entry = & path->path[i];
3523 type_t *type = skip_typeref(entry->type);
3524 if (is_type_compound(type)) {
3525 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3526 } else if (is_type_array(type)) {
3527 fprintf(stderr, "[%u]", (unsigned) entry->index);
3529 fprintf(stderr, "-INVALID-");
3532 fprintf(stderr, " (");
3533 print_type(path->top_type);
3534 fprintf(stderr, ")");
3537 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3539 size_t len = ARR_LEN(path->path);
3541 return & path->path[len-1];
3544 static type_path_entry_t *append_to_type_path(type_path_t *path)
3546 size_t len = ARR_LEN(path->path);
3547 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3549 type_path_entry_t *result = & path->path[len];
3550 memset(result, 0, sizeof(result[0]));
3554 static size_t get_compound_member_count(const compound_type_t *type)
3556 compound_t *compound = type->compound;
3557 size_t n_members = 0;
3558 entity_t *member = compound->members.entities;
3559 for ( ; member != NULL; member = member->base.next) {
3566 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3568 type_t *orig_top_type = path->top_type;
3569 type_t *top_type = skip_typeref(orig_top_type);
3571 assert(is_type_compound(top_type) || is_type_array(top_type));
3573 if (ARR_LEN(path->path) == 0) {
3576 type_path_entry_t *top = get_type_path_top(path);
3577 ir_initializer_t *initializer = top->initializer;
3578 return get_initializer_compound_value(initializer, top->index);
3582 static void descend_into_subtype(type_path_t *path)
3584 type_t *orig_top_type = path->top_type;
3585 type_t *top_type = skip_typeref(orig_top_type);
3587 assert(is_type_compound(top_type) || is_type_array(top_type));
3589 ir_initializer_t *initializer = get_initializer_entry(path);
3591 type_path_entry_t *top = append_to_type_path(path);
3592 top->type = top_type;
3596 if (is_type_compound(top_type)) {
3597 compound_t *const compound = top_type->compound.compound;
3598 entity_t *const entry = skip_unnamed_bitfields(compound->members.entities);
3600 top->compound_entry = entry;
3602 len = get_compound_member_count(&top_type->compound);
3603 if (entry != NULL) {
3604 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3605 path->top_type = entry->declaration.type;
3608 assert(is_type_array(top_type));
3609 assert(top_type->array.size > 0);
3612 path->top_type = top_type->array.element_type;
3613 len = top_type->array.size;
3615 if (initializer == NULL
3616 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3617 initializer = create_initializer_compound(len);
3618 /* we have to set the entry at the 2nd latest path entry... */
3619 size_t path_len = ARR_LEN(path->path);
3620 assert(path_len >= 1);
3622 type_path_entry_t *entry = & path->path[path_len-2];
3623 ir_initializer_t *tinitializer = entry->initializer;
3624 set_initializer_compound_value(tinitializer, entry->index,
3628 top->initializer = initializer;
3631 static void ascend_from_subtype(type_path_t *path)
3633 type_path_entry_t *top = get_type_path_top(path);
3635 path->top_type = top->type;
3637 size_t len = ARR_LEN(path->path);
3638 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3641 static void walk_designator(type_path_t *path, const designator_t *designator)
3643 /* designators start at current object type */
3644 ARR_RESIZE(type_path_entry_t, path->path, 1);
3646 for ( ; designator != NULL; designator = designator->next) {
3647 type_path_entry_t *top = get_type_path_top(path);
3648 type_t *orig_type = top->type;
3649 type_t *type = skip_typeref(orig_type);
3651 if (designator->symbol != NULL) {
3652 assert(is_type_compound(type));
3654 symbol_t *symbol = designator->symbol;
3656 compound_t *compound = type->compound.compound;
3657 entity_t *iter = compound->members.entities;
3658 for (; iter->base.symbol != symbol; iter = iter->base.next, ++index) {}
3659 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3661 /* revert previous initialisations of other union elements */
3662 if (type->kind == TYPE_COMPOUND_UNION) {
3663 ir_initializer_t *initializer = top->initializer;
3664 if (initializer != NULL
3665 && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3666 /* are we writing to a new element? */
3667 ir_initializer_t *oldi
3668 = get_initializer_compound_value(initializer, index);
3669 if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3670 /* clear initializer */
3672 = get_initializer_compound_n_entries(initializer);
3673 ir_initializer_t *nulli = get_initializer_null();
3674 for (size_t i = 0; i < len; ++i) {
3675 set_initializer_compound_value(initializer, i,
3682 top->type = orig_type;
3683 top->compound_entry = iter;
3685 orig_type = iter->declaration.type;
3687 expression_t *array_index = designator->array_index;
3688 assert(is_type_array(type));
3690 long index = fold_constant_to_int(array_index);
3691 assert(0 <= index && (!type->array.size_constant || (size_t)index < type->array.size));
3693 top->type = orig_type;
3694 top->index = (size_t) index;
3695 orig_type = type->array.element_type;
3697 path->top_type = orig_type;
3699 if (designator->next != NULL) {
3700 descend_into_subtype(path);
3704 path->invalid = false;
3707 static void advance_current_object(type_path_t *path)
3709 if (path->invalid) {
3710 /* TODO: handle this... */
3711 panic("invalid initializer (excessive elements)");
3714 type_path_entry_t *top = get_type_path_top(path);
3716 type_t *type = skip_typeref(top->type);
3717 if (is_type_union(type)) {
3718 /* only the first element is initialized in unions */
3719 top->compound_entry = NULL;
3720 } else if (is_type_struct(type)) {
3721 entity_t *entry = top->compound_entry;
3724 entry = skip_unnamed_bitfields(entry->base.next);
3725 top->compound_entry = entry;
3726 if (entry != NULL) {
3727 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3728 path->top_type = entry->declaration.type;
3732 assert(is_type_array(type));
3735 if (!type->array.size_constant || top->index < type->array.size) {
3740 /* we're past the last member of the current sub-aggregate, try if we
3741 * can ascend in the type hierarchy and continue with another subobject */
3742 size_t len = ARR_LEN(path->path);
3745 ascend_from_subtype(path);
3746 advance_current_object(path);
3748 path->invalid = true;
3753 static ir_initializer_t *create_ir_initializer_value(
3754 const initializer_value_t *initializer)
3756 expression_t *expr = initializer->value;
3757 type_t *type = skip_typeref(expr->base.type);
3759 if (is_type_compound(type)) {
3760 if (expr->kind == EXPR_UNARY_CAST) {
3761 expr = expr->unary.value;
3762 type = skip_typeref(expr->base.type);
3764 /* must be a compound literal... */
3765 if (expr->kind == EXPR_COMPOUND_LITERAL) {
3766 return create_ir_initializer(expr->compound_literal.initializer,
3771 ir_node *value = expression_to_firm(expr);
3772 if (!is_type_compound(type)) {
3773 ir_mode *mode = get_ir_mode_storage(type);
3774 value = create_conv(NULL, value, mode);
3776 return create_initializer_const(value);
3779 /** Tests whether type can be initialized by a string constant */
3780 static bool is_string_type(type_t *type)
3782 if (!is_type_array(type))
3785 type_t *const inner = skip_typeref(type->array.element_type);
3786 return is_type_integer(inner);
3789 static ir_initializer_t *create_ir_initializer_list(
3790 const initializer_list_t *initializer, type_t *type)
3793 memset(&path, 0, sizeof(path));
3794 path.top_type = type;
3795 path.path = NEW_ARR_F(type_path_entry_t, 0);
3797 descend_into_subtype(&path);
3799 for (size_t i = 0; i < initializer->len; ++i) {
3800 const initializer_t *sub_initializer = initializer->initializers[i];
3802 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3803 walk_designator(&path, sub_initializer->designator.designator);
3807 if (sub_initializer->kind == INITIALIZER_VALUE) {
3808 const expression_t *expr = sub_initializer->value.value;
3809 const type_t *expr_type = skip_typeref(expr->base.type);
3810 /* we might have to descend into types until the types match */
3812 type_t *orig_top_type = path.top_type;
3813 type_t *top_type = skip_typeref(orig_top_type);
3815 if (types_compatible(top_type, expr_type))
3817 descend_into_subtype(&path);
3819 } else if (sub_initializer->kind == INITIALIZER_STRING) {
3820 /* we might have to descend into types until we're at a scalar
3823 type_t *orig_top_type = path.top_type;
3824 type_t *top_type = skip_typeref(orig_top_type);
3826 if (is_string_type(top_type))
3828 descend_into_subtype(&path);
3832 ir_initializer_t *sub_irinitializer
3833 = create_ir_initializer(sub_initializer, path.top_type);
3835 size_t path_len = ARR_LEN(path.path);
3836 assert(path_len >= 1);
3837 type_path_entry_t *entry = & path.path[path_len-1];
3838 ir_initializer_t *tinitializer = entry->initializer;
3839 set_initializer_compound_value(tinitializer, entry->index,
3842 advance_current_object(&path);
3845 assert(ARR_LEN(path.path) >= 1);
3846 ir_initializer_t *result = path.path[0].initializer;
3847 DEL_ARR_F(path.path);
3852 static ir_initializer_t *create_ir_initializer_string(initializer_t const *const init, type_t *type)
3854 type = skip_typeref(type);
3856 assert(type->kind == TYPE_ARRAY);
3857 assert(type->array.size_constant);
3858 string_literal_expression_t const *const str = get_init_string(init);
3859 size_t const str_len = str->value.size;
3860 size_t const arr_len = type->array.size;
3861 ir_initializer_t *const irinit = create_initializer_compound(arr_len);
3862 ir_mode *const mode = get_ir_mode_storage(type->array.element_type);
3863 char const * p = str->value.begin;
3864 switch (str->value.encoding) {
3865 case STRING_ENCODING_CHAR:
3866 case STRING_ENCODING_UTF8:
3867 for (size_t i = 0; i != arr_len; ++i) {
3868 char const c = i < str_len ? *p++ : 0;
3869 ir_tarval *const tv = new_tarval_from_long(c, mode);
3870 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3871 set_initializer_compound_value(irinit, i, tvinit);
3875 case STRING_ENCODING_CHAR16:
3876 case STRING_ENCODING_CHAR32:
3877 case STRING_ENCODING_WIDE:
3878 for (size_t i = 0; i != arr_len; ++i) {
3879 utf32 const c = i < str_len ? read_utf8_char(&p) : 0;
3880 ir_tarval *const tv = new_tarval_from_long(c, mode);
3881 ir_initializer_t *const tvinit = create_initializer_tarval(tv);
3882 set_initializer_compound_value(irinit, i, tvinit);
3890 static ir_initializer_t *create_ir_initializer(
3891 const initializer_t *initializer, type_t *type)
3893 switch(initializer->kind) {
3894 case INITIALIZER_STRING:
3895 return create_ir_initializer_string(initializer, type);
3897 case INITIALIZER_LIST:
3898 return create_ir_initializer_list(&initializer->list, type);
3900 case INITIALIZER_VALUE:
3901 return create_ir_initializer_value(&initializer->value);
3903 case INITIALIZER_DESIGNATOR:
3904 panic("unexpected designator initializer");
3906 panic("unknown initializer");
3909 /** ANSI C ยง6.7.8:21: If there are fewer initializers [..] than there
3910 * are elements [...] the remainder of the aggregate shall be initialized
3911 * implicitly the same as objects that have static storage duration. */
3912 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
3915 /* for unions we must NOT do anything for null initializers */
3916 ir_type *owner = get_entity_owner(entity);
3917 if (is_Union_type(owner)) {
3921 ir_type *ent_type = get_entity_type(entity);
3922 /* create sub-initializers for a compound type */
3923 if (is_compound_type(ent_type)) {
3924 unsigned n_members = get_compound_n_members(ent_type);
3925 for (unsigned n = 0; n < n_members; ++n) {
3926 ir_entity *member = get_compound_member(ent_type, n);
3927 ir_node *addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3929 create_dynamic_null_initializer(member, dbgi, addr);
3933 if (is_Array_type(ent_type)) {
3934 assert(has_array_upper_bound(ent_type, 0));
3935 long n = get_array_upper_bound_int(ent_type, 0);
3936 for (long i = 0; i < n; ++i) {
3937 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
3938 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
3939 ir_node *cnst = new_d_Const(dbgi, index_tv);
3940 ir_node *in[1] = { cnst };
3941 ir_entity *arrent = get_array_element_entity(ent_type);
3942 ir_node *addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3944 create_dynamic_null_initializer(arrent, dbgi, addr);
3949 ir_mode *value_mode = get_type_mode(ent_type);
3950 ir_node *node = new_Const(get_mode_null(value_mode));
3952 /* is it a bitfield type? */
3953 if (is_Primitive_type(ent_type) &&
3954 get_primitive_base_type(ent_type) != NULL) {
3955 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3959 ir_node *mem = get_store();
3960 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3961 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3965 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3966 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3968 switch(get_initializer_kind(initializer)) {
3969 case IR_INITIALIZER_NULL:
3970 create_dynamic_null_initializer(entity, dbgi, base_addr);
3972 case IR_INITIALIZER_CONST: {
3973 ir_node *node = get_initializer_const_value(initializer);
3974 ir_type *ent_type = get_entity_type(entity);
3976 /* is it a bitfield type? */
3977 if (is_Primitive_type(ent_type) &&
3978 get_primitive_base_type(ent_type) != NULL) {
3979 bitfield_store_to_firm(dbgi, entity, base_addr, node, false, false);
3983 ir_node *mem = get_store();
3985 if (is_compound_type(ent_type)) {
3986 ir_node *copyb = new_d_CopyB(dbgi, mem, base_addr, node, ent_type);
3987 new_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
3989 assert(get_type_mode(type) == get_irn_mode(node));
3990 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3991 new_mem = new_Proj(store, mode_M, pn_Store_M);
3996 case IR_INITIALIZER_TARVAL: {
3997 ir_tarval *tv = get_initializer_tarval_value(initializer);
3998 ir_node *cnst = new_d_Const(dbgi, tv);
3999 ir_type *ent_type = get_entity_type(entity);
4001 /* is it a bitfield type? */
4002 if (is_Primitive_type(ent_type) &&
4003 get_primitive_base_type(ent_type) != NULL) {
4004 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false, false);
4008 assert(get_type_mode(type) == get_tarval_mode(tv));
4009 ir_node *mem = get_store();
4010 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4011 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4015 case IR_INITIALIZER_COMPOUND: {
4016 assert(is_compound_type(type) || is_Array_type(type));
4018 if (is_Array_type(type)) {
4019 assert(has_array_upper_bound(type, 0));
4020 n_members = get_array_upper_bound_int(type, 0);
4022 n_members = get_compound_n_members(type);
4025 if (get_initializer_compound_n_entries(initializer)
4026 != (unsigned) n_members)
4027 panic("initializer doesn't match compound type");
4029 for (int i = 0; i < n_members; ++i) {
4032 ir_entity *sub_entity;
4033 if (is_Array_type(type)) {
4034 ir_mode *mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
4035 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4036 ir_node *cnst = new_d_Const(dbgi, index_tv);
4037 ir_node *in[1] = { cnst };
4038 irtype = get_array_element_type(type);
4039 sub_entity = get_array_element_entity(type);
4040 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4043 sub_entity = get_compound_member(type, i);
4044 irtype = get_entity_type(sub_entity);
4045 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4049 ir_initializer_t *sub_init
4050 = get_initializer_compound_value(initializer, i);
4052 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4059 panic("invalid ir_initializer");
4062 static void create_dynamic_initializer(ir_initializer_t *initializer,
4063 dbg_info *dbgi, ir_entity *entity)
4065 ir_node *frame = get_irg_frame(current_ir_graph);
4066 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4067 ir_type *type = get_entity_type(entity);
4069 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4072 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4073 ir_entity *entity, type_t *type)
4075 ir_node *memory = get_store();
4076 ir_node *nomem = new_NoMem();
4077 ir_node *frame = get_irg_frame(current_ir_graph);
4078 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4080 if (initializer->kind == INITIALIZER_VALUE) {
4081 initializer_value_t *initializer_value = &initializer->value;
4083 ir_node *value = expression_to_firm(initializer_value->value);
4084 type = skip_typeref(type);
4085 assign_value(dbgi, addr, type, value);
4089 if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4090 ir_initializer_t *irinitializer
4091 = create_ir_initializer(initializer, type);
4093 create_dynamic_initializer(irinitializer, dbgi, entity);
4097 /* create a "template" entity which is copied to the entity on the stack */
4098 ir_entity *const init_entity
4099 = create_initializer_entity(dbgi, initializer, type);
4100 ir_node *const src_addr = create_symconst(dbgi, init_entity);
4101 ir_type *const irtype = get_ir_type(type);
4102 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4104 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4105 set_store(copyb_mem);
4108 static void create_initializer_local_variable_entity(entity_t *entity)
4110 assert(entity->kind == ENTITY_VARIABLE);
4111 initializer_t *initializer = entity->variable.initializer;
4112 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4113 ir_entity *irentity = entity->variable.v.entity;
4114 type_t *type = entity->declaration.type;
4116 create_local_initializer(initializer, dbgi, irentity, type);
4119 static void create_variable_initializer(entity_t *entity)
4121 assert(entity->kind == ENTITY_VARIABLE);
4122 initializer_t *initializer = entity->variable.initializer;
4123 if (initializer == NULL)
4126 declaration_kind_t declaration_kind
4127 = (declaration_kind_t) entity->declaration.kind;
4128 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4129 create_initializer_local_variable_entity(entity);
4133 type_t *type = entity->declaration.type;
4134 type_qualifiers_t tq = get_type_qualifier(type, true);
4136 if (initializer->kind == INITIALIZER_VALUE) {
4137 expression_t * value = initializer->value.value;
4138 type_t *const init_type = skip_typeref(value->base.type);
4140 if (!is_type_scalar(init_type)) {
4142 while (value->kind == EXPR_UNARY_CAST)
4143 value = value->unary.value;
4145 if (value->kind != EXPR_COMPOUND_LITERAL)
4146 panic("expected non-scalar initializer to be a compound literal");
4147 initializer = value->compound_literal.initializer;
4148 goto have_initializer;
4151 ir_node * node = expression_to_firm(value);
4152 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4153 ir_mode *const mode = get_ir_mode_storage(init_type);
4154 node = create_conv(dbgi, node, mode);
4156 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4157 set_value(entity->variable.v.value_number, node);
4159 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4161 ir_entity *irentity = entity->variable.v.entity;
4163 if (tq & TYPE_QUALIFIER_CONST
4164 && get_entity_owner(irentity) != get_tls_type()) {
4165 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4167 set_atomic_ent_value(irentity, node);
4171 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4172 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4174 ir_entity *irentity = entity->variable.v.entity;
4175 ir_initializer_t *irinitializer
4176 = create_ir_initializer(initializer, type);
4178 if (tq & TYPE_QUALIFIER_CONST) {
4179 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4181 set_entity_initializer(irentity, irinitializer);
4185 static void create_variable_length_array(entity_t *entity)
4187 assert(entity->kind == ENTITY_VARIABLE);
4188 assert(entity->variable.initializer == NULL);
4190 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4191 entity->variable.v.vla_base = NULL;
4193 /* TODO: record VLA somewhere so we create the free node when we leave
4197 static void allocate_variable_length_array(entity_t *entity)
4199 assert(entity->kind == ENTITY_VARIABLE);
4200 assert(entity->variable.initializer == NULL);
4201 assert(currently_reachable());
4203 dbg_info *dbgi = get_dbg_info(&entity->base.pos);
4204 type_t *type = entity->declaration.type;
4205 ir_type *el_type = get_ir_type(type->array.element_type);
4207 /* make sure size_node is calculated */
4208 get_type_size_node(type);
4209 ir_node *elems = type->array.size_node;
4210 ir_node *mem = get_store();
4211 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4213 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4214 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4217 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4218 entity->variable.v.vla_base = addr;
4221 static bool var_needs_entity(variable_t const *const var)
4223 if (var->address_taken)
4225 type_t *const type = skip_typeref(var->base.type);
4226 return !is_type_scalar(type) || type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
4230 * Creates a Firm local variable from a declaration.
4232 static void create_local_variable(entity_t *entity)
4234 assert(entity->kind == ENTITY_VARIABLE);
4235 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4237 if (!var_needs_entity(&entity->variable)) {
4238 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4239 entity->variable.v.value_number = next_value_number_function;
4240 set_irg_loc_description(current_ir_graph, next_value_number_function, entity);
4241 ++next_value_number_function;
4245 /* is it a variable length array? */
4246 type_t *const type = skip_typeref(entity->declaration.type);
4247 if (is_type_array(type) && !type->array.size_constant) {
4248 create_variable_length_array(entity);
4252 ir_type *const frame_type = get_irg_frame_type(current_ir_graph);
4253 create_variable_entity(entity, DECLARATION_KIND_LOCAL_VARIABLE_ENTITY, frame_type);
4256 static void create_local_static_variable(entity_t *entity)
4258 assert(entity->kind == ENTITY_VARIABLE);
4259 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4261 type_t *type = skip_typeref(entity->declaration.type);
4262 ir_type *const var_type = entity->variable.thread_local ?
4263 get_tls_type() : get_glob_type();
4264 ir_type *const irtype = get_ir_type(type);
4265 dbg_info *const dbgi = get_dbg_info(&entity->base.pos);
4267 size_t l = strlen(entity->base.symbol->string);
4268 char buf[l + sizeof(".%u")];
4269 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4270 ident *const id = id_unique(buf);
4271 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4273 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4274 set_entity_volatility(irentity, volatility_is_volatile);
4277 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4278 entity->variable.v.entity = irentity;
4280 set_entity_ld_ident(irentity, id);
4281 set_entity_visibility(irentity, ir_visibility_local);
4283 if (entity->variable.initializer == NULL) {
4284 ir_initializer_t *null_init = get_initializer_null();
4285 set_entity_initializer(irentity, null_init);
4288 PUSH_IRG(get_const_code_irg());
4289 create_variable_initializer(entity);
4295 static ir_node *return_statement_to_firm(return_statement_t *statement)
4297 if (!currently_reachable())
4300 dbg_info *const dbgi = get_dbg_info(&statement->base.pos);
4301 type_t *const type = skip_typeref(current_function_entity->declaration.type->function.return_type);
4302 ir_node * res = statement->value ? expression_to_firm(statement->value) : NULL;
4305 if (!is_type_void(type)) {
4306 ir_mode *const mode = get_ir_mode_storage(type);
4308 res = create_conv(dbgi, res, mode);
4310 res = new_Unknown(mode);
4317 ir_node *const in[1] = { res };
4318 ir_node *const store = get_store();
4319 ir_node *const ret = new_d_Return(dbgi, store, in_len, in);
4321 ir_node *end_block = get_irg_end_block(current_ir_graph);
4322 add_immBlock_pred(end_block, ret);
4324 set_unreachable_now();
4328 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4330 if (!currently_reachable())
4333 return expression_to_firm(statement->expression);
4336 static void create_local_declarations(entity_t*);
4338 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4340 create_local_declarations(compound->scope.entities);
4342 ir_node *result = NULL;
4343 statement_t *statement = compound->statements;
4344 for ( ; statement != NULL; statement = statement->base.next) {
4345 result = statement_to_firm(statement);
4351 static void create_global_variable(entity_t *entity)
4353 ir_linkage linkage = IR_LINKAGE_DEFAULT;
4354 ir_visibility visibility = ir_visibility_external;
4355 storage_class_tag_t storage
4356 = (storage_class_tag_t)entity->declaration.storage_class;
4357 decl_modifiers_t modifiers = entity->declaration.modifiers;
4358 assert(entity->kind == ENTITY_VARIABLE);
4361 case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4362 case STORAGE_CLASS_STATIC: visibility = ir_visibility_local; break;
4363 case STORAGE_CLASS_NONE: visibility = ir_visibility_external; break;
4364 case STORAGE_CLASS_TYPEDEF:
4365 case STORAGE_CLASS_AUTO:
4366 case STORAGE_CLASS_REGISTER:
4367 panic("invalid storage class for global var");
4370 /* "common" symbols */
4371 if (storage == STORAGE_CLASS_NONE
4372 && entity->variable.initializer == NULL
4373 && !entity->variable.thread_local
4374 && (modifiers & DM_WEAK) == 0) {
4375 linkage |= IR_LINKAGE_MERGE;
4378 ir_type *var_type = get_glob_type();
4379 if (entity->variable.thread_local) {
4380 var_type = get_tls_type();
4382 create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4383 ir_entity *irentity = entity->variable.v.entity;
4384 add_entity_linkage(irentity, linkage);
4385 set_entity_visibility(irentity, visibility);
4386 if (entity->variable.initializer == NULL
4387 && storage != STORAGE_CLASS_EXTERN) {
4388 ir_initializer_t *null_init = get_initializer_null();
4389 set_entity_initializer(irentity, null_init);
4393 static void create_local_declaration(entity_t *entity)
4395 assert(is_declaration(entity));
4397 /* construct type */
4398 (void) get_ir_type(entity->declaration.type);
4399 if (entity->base.symbol == NULL) {
4403 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4404 case STORAGE_CLASS_STATIC:
4405 if (entity->kind == ENTITY_FUNCTION) {
4406 (void)get_function_entity(entity, NULL);
4408 create_local_static_variable(entity);
4411 case STORAGE_CLASS_EXTERN:
4412 if (entity->kind == ENTITY_FUNCTION) {
4413 assert(entity->function.body == NULL);
4414 (void)get_function_entity(entity, NULL);
4416 create_global_variable(entity);
4417 create_variable_initializer(entity);
4420 case STORAGE_CLASS_NONE:
4421 case STORAGE_CLASS_AUTO:
4422 case STORAGE_CLASS_REGISTER:
4423 if (entity->kind == ENTITY_FUNCTION) {
4424 if (entity->function.body != NULL) {
4425 ir_type *owner = get_irg_frame_type(current_ir_graph);
4426 (void)get_function_entity(entity, owner);
4427 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4428 enqueue_inner_function(entity);
4430 (void)get_function_entity(entity, NULL);
4433 create_local_variable(entity);
4436 case STORAGE_CLASS_TYPEDEF:
4439 panic("invalid storage class");
4442 static void create_local_declarations(entity_t *e)
4444 for (; e; e = e->base.next) {
4445 if (is_declaration(e))
4446 create_local_declaration(e);
4450 static void initialize_local_declaration(entity_t *entity)
4452 if (entity->base.symbol == NULL)
4455 // no need to emit code in dead blocks
4456 if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4457 && !currently_reachable())
4460 switch ((declaration_kind_t) entity->declaration.kind) {
4461 case DECLARATION_KIND_LOCAL_VARIABLE:
4462 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4463 create_variable_initializer(entity);
4466 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4467 allocate_variable_length_array(entity);
4470 case DECLARATION_KIND_COMPOUND_MEMBER:
4471 case DECLARATION_KIND_GLOBAL_VARIABLE:
4472 case DECLARATION_KIND_FUNCTION:
4473 case DECLARATION_KIND_INNER_FUNCTION:
4476 case DECLARATION_KIND_PARAMETER:
4477 case DECLARATION_KIND_PARAMETER_ENTITY:
4478 panic("can't initialize parameters");
4480 case DECLARATION_KIND_UNKNOWN:
4481 panic("can't initialize unknown declaration");
4483 panic("invalid declaration kind");
4486 static ir_node *declaration_statement_to_firm(declaration_statement_t *statement)
4488 entity_t *entity = statement->declarations_begin;
4492 entity_t *const last = statement->declarations_end;
4493 for ( ;; entity = entity->base.next) {
4494 if (is_declaration(entity)) {
4495 initialize_local_declaration(entity);
4496 } else if (entity->kind == ENTITY_TYPEDEF) {
4497 /* ยง6.7.7:3 Any array size expressions associated with variable length
4498 * array declarators are evaluated each time the declaration of the
4499 * typedef name is reached in the order of execution. */
4500 type_t *const type = skip_typeref(entity->typedefe.type);
4501 if (is_type_array(type) && type->array.is_vla)
4502 get_vla_size(&type->array);
4511 static ir_node *if_statement_to_firm(if_statement_t *statement)
4513 create_local_declarations(statement->scope.entities);
4515 /* Create the condition. */
4516 jump_target true_target;
4517 jump_target false_target;
4518 init_jump_target(&true_target, NULL);
4519 init_jump_target(&false_target, NULL);
4520 if (currently_reachable())
4521 create_condition_evaluation(statement->condition, &true_target, &false_target);
4523 jump_target exit_target;
4524 init_jump_target(&exit_target, NULL);
4526 /* Create the true statement. */
4527 enter_jump_target(&true_target);
4528 statement_to_firm(statement->true_statement);
4529 jump_to_target(&exit_target);
4531 /* Create the false statement. */
4532 enter_jump_target(&false_target);
4533 if (statement->false_statement)
4534 statement_to_firm(statement->false_statement);
4535 jump_to_target(&exit_target);
4537 enter_jump_target(&exit_target);
4541 static ir_node *do_while_statement_to_firm(do_while_statement_t *statement)
4543 create_local_declarations(statement->scope.entities);
4546 PUSH_CONTINUE(NULL);
4548 expression_t *const cond = statement->condition;
4549 /* Avoid an explicit body block in case of do ... while (0);. */
4550 if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT && !fold_constant_to_bool(cond)) {
4551 /* do ... while (0);. */
4552 statement_to_firm(statement->body);
4553 jump_to_target(&continue_target);
4554 enter_jump_target(&continue_target);
4555 jump_to_target(&break_target);
4557 jump_target body_target;
4558 init_jump_target(&body_target, NULL);
4559 jump_to_target(&body_target);
4560 enter_immature_jump_target(&body_target);
4562 statement_to_firm(statement->body);
4563 jump_to_target(&continue_target);
4564 if (enter_jump_target(&continue_target))
4565 create_condition_evaluation(statement->condition, &body_target, &break_target);
4566 enter_jump_target(&body_target);
4568 enter_jump_target(&break_target);
4575 static ir_node *for_statement_to_firm(for_statement_t *statement)
4577 create_local_declarations(statement->scope.entities);
4579 if (currently_reachable()) {
4580 entity_t *entity = statement->scope.entities;
4581 for ( ; entity != NULL; entity = entity->base.next) {
4582 if (!is_declaration(entity))
4585 initialize_local_declaration(entity);
4588 if (statement->initialisation != NULL) {
4589 expression_to_firm(statement->initialisation);
4593 /* Create the header block */
4594 jump_target header_target;
4595 init_jump_target(&header_target, NULL);
4596 jump_to_target(&header_target);
4597 enter_immature_jump_target(&header_target);
4600 expression_t *const step = statement->step;
4602 PUSH_CONTINUE(step ? NULL : header_target.block);
4604 /* Create the condition. */
4605 expression_t *const cond = statement->condition;
4606 if (cond && (is_constant_expression(cond) != EXPR_CLASS_CONSTANT || !fold_constant_to_bool(cond))) {
4607 jump_target body_target;
4608 init_jump_target(&body_target, NULL);
4609 create_condition_evaluation(cond, &body_target, &break_target);
4610 enter_jump_target(&body_target);
4613 /* Create the loop body. */
4614 statement_to_firm(statement->body);
4615 jump_to_target(&continue_target);
4617 /* Create the step code. */
4618 if (step && enter_jump_target(&continue_target)) {
4619 expression_to_firm(step);
4620 jump_to_target(&header_target);
4623 enter_jump_target(&header_target);
4624 enter_jump_target(&break_target);
4631 static ir_switch_table *create_switch_table(const switch_statement_t *statement)
4633 /* determine number of cases */
4635 for (case_label_statement_t *l = statement->first_case; l != NULL;
4638 if (l->expression == NULL)
4640 if (l->is_empty_range)
4645 ir_switch_table *res = ir_new_switch_table(current_ir_graph, n_cases);
4647 for (case_label_statement_t *l = statement->first_case; l != NULL;
4649 if (l->expression == NULL) {
4650 l->pn = pn_Switch_default;
4653 if (l->is_empty_range)
4655 ir_tarval *min = l->first_case;
4656 ir_tarval *max = l->last_case;
4657 long pn = (long) i+1;
4658 ir_switch_table_set(res, i++, min, max, pn);
4664 static ir_node *switch_statement_to_firm(switch_statement_t *statement)
4666 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4667 ir_node *switch_node = NULL;
4669 if (currently_reachable()) {
4670 ir_node *expression = expression_to_firm(statement->expression);
4671 ir_switch_table *table = create_switch_table(statement);
4672 unsigned n_outs = (unsigned)ir_switch_table_get_n_entries(table) + 1;
4674 switch_node = new_d_Switch(dbgi, expression, n_outs, table);
4677 set_unreachable_now();
4680 ir_node *const old_switch = current_switch;
4681 const bool old_saw_default_label = saw_default_label;
4682 saw_default_label = false;
4683 current_switch = switch_node;
4685 statement_to_firm(statement->body);
4686 jump_to_target(&break_target);
4688 if (!saw_default_label && switch_node) {
4689 ir_node *proj = new_d_Proj(dbgi, switch_node, mode_X, pn_Switch_default);
4690 add_pred_to_jump_target(&break_target, proj);
4693 enter_jump_target(&break_target);
4695 assert(current_switch == switch_node);
4696 current_switch = old_switch;
4697 saw_default_label = old_saw_default_label;
4702 static ir_node *case_label_to_firm(const case_label_statement_t *statement)
4704 if (current_switch != NULL && !statement->is_empty_range) {
4705 jump_target case_target;
4706 init_jump_target(&case_target, NULL);
4708 /* Fallthrough from previous case */
4709 jump_to_target(&case_target);
4711 ir_node *const proj = new_Proj(current_switch, mode_X, statement->pn);
4712 add_pred_to_jump_target(&case_target, proj);
4713 if (statement->expression == NULL)
4714 saw_default_label = true;
4716 enter_jump_target(&case_target);
4719 return statement_to_firm(statement->statement);
4722 static ir_node *label_to_firm(const label_statement_t *statement)
4724 label_t *const label = statement->label;
4725 prepare_label_target(label);
4726 jump_to_target(&label->target);
4727 if (--label->n_users == 0) {
4728 enter_jump_target(&label->target);
4730 enter_immature_jump_target(&label->target);
4734 return statement_to_firm(statement->statement);
4737 static ir_node *goto_statement_to_firm(goto_statement_t *const stmt)
4739 label_t *const label = stmt->label;
4740 prepare_label_target(label);
4741 jump_to_target(&label->target);
4742 if (--label->n_users == 0)
4743 enter_jump_target(&label->target);
4744 set_unreachable_now();
4748 static ir_node *computed_goto_to_firm(computed_goto_statement_t const *const statement)
4750 if (currently_reachable()) {
4751 ir_node *const op = expression_to_firm(statement->expression);
4752 ARR_APP1(ir_node*, ijmp_ops, op);
4753 jump_to_target(&ijmp_target);
4754 set_unreachable_now();
4759 static ir_node *asm_statement_to_firm(const asm_statement_t *statement)
4761 bool needs_memory = statement->is_volatile;
4762 size_t n_clobbers = 0;
4763 asm_clobber_t *clobber = statement->clobbers;
4764 for ( ; clobber != NULL; clobber = clobber->next) {
4765 const char *clobber_str = clobber->clobber.begin;
4767 if (!be_is_valid_clobber(clobber_str)) {
4768 errorf(&statement->base.pos,
4769 "invalid clobber '%s' specified", clobber->clobber);
4773 if (streq(clobber_str, "memory")) {
4774 needs_memory = true;
4778 ident *id = new_id_from_str(clobber_str);
4779 obstack_ptr_grow(&asm_obst, id);
4782 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4783 ident **clobbers = NULL;
4784 if (n_clobbers > 0) {
4785 clobbers = obstack_finish(&asm_obst);
4788 size_t n_inputs = 0;
4789 asm_argument_t *argument = statement->inputs;
4790 for ( ; argument != NULL; argument = argument->next)
4792 size_t n_outputs = 0;
4793 argument = statement->outputs;
4794 for ( ; argument != NULL; argument = argument->next)
4797 unsigned next_pos = 0;
4799 ir_node *ins[n_inputs + n_outputs + 1];
4802 ir_asm_constraint tmp_in_constraints[n_outputs];
4804 const expression_t *out_exprs[n_outputs];
4805 ir_node *out_addrs[n_outputs];
4806 size_t out_size = 0;
4808 argument = statement->outputs;
4809 for ( ; argument != NULL; argument = argument->next) {
4810 const char *constraints = argument->constraints.begin;
4811 asm_constraint_flags_t asm_flags
4812 = be_parse_asm_constraints(constraints);
4815 position_t const *const pos = &statement->base.pos;
4816 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4817 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
4819 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4820 errorf(pos, "some constraints in '%s' are invalid", constraints);
4823 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4824 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
4829 unsigned pos = next_pos++;
4830 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4831 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4832 expression_t *expr = argument->expression;
4833 ir_node *addr = expression_to_addr(expr);
4834 /* in+output, construct an artifical same_as constraint on the
4836 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4838 ir_node *value = get_value_from_lvalue(expr, addr);
4840 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
4842 ir_asm_constraint constraint;
4843 constraint.pos = pos;
4844 constraint.constraint = new_id_from_str(buf);
4845 constraint.mode = get_ir_mode_storage(expr->base.type);
4846 tmp_in_constraints[in_size] = constraint;
4847 ins[in_size] = value;
4852 out_exprs[out_size] = expr;
4853 out_addrs[out_size] = addr;
4855 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4856 /* pure memory ops need no input (but we have to make sure we
4857 * attach to the memory) */
4858 assert(! (asm_flags &
4859 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4860 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4861 needs_memory = true;
4863 /* we need to attach the address to the inputs */
4864 expression_t *expr = argument->expression;
4866 ir_asm_constraint constraint;
4867 constraint.pos = pos;
4868 constraint.constraint = new_id_from_str(constraints);
4869 constraint.mode = mode_M;
4870 tmp_in_constraints[in_size] = constraint;
4872 ins[in_size] = expression_to_addr(expr);
4876 errorf(&statement->base.pos,
4877 "only modifiers but no place set in constraints '%s'",
4882 ir_asm_constraint constraint;
4883 constraint.pos = pos;
4884 constraint.constraint = new_id_from_str(constraints);
4885 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
4887 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4889 assert(obstack_object_size(&asm_obst)
4890 == out_size * sizeof(ir_asm_constraint));
4891 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4894 obstack_grow(&asm_obst, tmp_in_constraints,
4895 in_size * sizeof(tmp_in_constraints[0]));
4896 /* find and count input and output arguments */
4897 argument = statement->inputs;
4898 for ( ; argument != NULL; argument = argument->next) {
4899 const char *constraints = argument->constraints.begin;
4900 asm_constraint_flags_t asm_flags
4901 = be_parse_asm_constraints(constraints);
4903 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4904 errorf(&statement->base.pos,
4905 "some constraints in '%s' are not supported", constraints);
4908 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4909 errorf(&statement->base.pos,
4910 "some constraints in '%s' are invalid", constraints);
4913 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4914 errorf(&statement->base.pos,
4915 "write flag specified for input constraints '%s'",
4921 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4922 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4923 /* we can treat this as "normal" input */
4924 input = expression_to_firm(argument->expression);
4925 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4926 /* pure memory ops need no input (but we have to make sure we
4927 * attach to the memory) */
4928 assert(! (asm_flags &
4929 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4930 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4931 needs_memory = true;
4932 input = expression_to_addr(argument->expression);
4934 errorf(&statement->base.pos,
4935 "only modifiers but no place set in constraints '%s'",
4940 ir_asm_constraint constraint;
4941 constraint.pos = next_pos++;
4942 constraint.constraint = new_id_from_str(constraints);
4943 constraint.mode = get_irn_mode(input);
4945 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4946 ins[in_size++] = input;
4949 ir_node *mem = needs_memory ? get_store() : new_NoMem();
4950 assert(obstack_object_size(&asm_obst)
4951 == in_size * sizeof(ir_asm_constraint));
4952 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4954 /* create asm node */
4955 dbg_info *dbgi = get_dbg_info(&statement->base.pos);
4957 ident *asm_text = new_id_from_str(statement->asm_text.begin);
4959 ir_node *node = new_d_ASM(dbgi, mem, in_size, ins, input_constraints,
4960 out_size, output_constraints,
4961 n_clobbers, clobbers, asm_text);
4963 if (statement->is_volatile) {
4964 set_irn_pinned(node, op_pin_state_pinned);
4966 set_irn_pinned(node, op_pin_state_floats);
4969 /* create output projs & connect them */
4971 ir_node *projm = new_Proj(node, mode_M, out_size);
4976 for (i = 0; i < out_size; ++i) {
4977 const expression_t *out_expr = out_exprs[i];
4979 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
4980 ir_node *proj = new_Proj(node, mode, pn);
4981 ir_node *addr = out_addrs[i];
4983 set_value_for_expression_addr(out_expr, proj, addr);
4989 static ir_node *ms_try_statement_to_firm(ms_try_statement_t *statement)
4991 statement_to_firm(statement->try_statement);
4992 position_t const *const pos = &statement->base.pos;
4993 warningf(WARN_OTHER, pos, "structured exception handling ignored");
4997 static ir_node *leave_statement_to_firm(leave_statement_t *statement)
4999 errorf(&statement->base.pos, "__leave not supported yet");
5004 * Transform a statement.
5006 static ir_node *statement_to_firm(statement_t *const stmt)
5009 assert(!stmt->base.transformed);
5010 stmt->base.transformed = true;
5013 switch (stmt->kind) {
5014 case STATEMENT_ASM: return asm_statement_to_firm( &stmt->asms);
5015 case STATEMENT_CASE_LABEL: return case_label_to_firm( &stmt->case_label);
5016 case STATEMENT_COMPOUND: return compound_statement_to_firm( &stmt->compound);
5017 case STATEMENT_COMPUTED_GOTO: return computed_goto_to_firm( &stmt->computed_goto);
5018 case STATEMENT_DECLARATION: return declaration_statement_to_firm(&stmt->declaration);
5019 case STATEMENT_DO_WHILE: return do_while_statement_to_firm( &stmt->do_while);
5020 case STATEMENT_EMPTY: return NULL; /* nothing */
5021 case STATEMENT_EXPRESSION: return expression_statement_to_firm( &stmt->expression);
5022 case STATEMENT_FOR: return for_statement_to_firm( &stmt->fors);
5023 case STATEMENT_GOTO: return goto_statement_to_firm( &stmt->gotos);
5024 case STATEMENT_IF: return if_statement_to_firm( &stmt->ifs);
5025 case STATEMENT_LABEL: return label_to_firm( &stmt->label);
5026 case STATEMENT_LEAVE: return leave_statement_to_firm( &stmt->leave);
5027 case STATEMENT_MS_TRY: return ms_try_statement_to_firm( &stmt->ms_try);
5028 case STATEMENT_RETURN: return return_statement_to_firm( &stmt->returns);
5029 case STATEMENT_SWITCH: return switch_statement_to_firm( &stmt->switchs);
5033 case STATEMENT_BREAK: tgt = &break_target; goto jump;
5034 case STATEMENT_CONTINUE: tgt = &continue_target; goto jump;
5036 jump_to_target(tgt);
5037 set_unreachable_now();
5041 case STATEMENT_ERROR: panic("error statement");
5043 panic("statement not implemented");
5046 static int count_local_variables(const entity_t *entity,
5047 const entity_t *const last)
5050 entity_t const *const end = last != NULL ? last->base.next : NULL;
5051 for (; entity != end; entity = entity->base.next) {
5052 if ((entity->kind == ENTITY_VARIABLE || entity->kind == ENTITY_PARAMETER) &&
5053 !var_needs_entity(&entity->variable))
5059 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5061 int *const count = env;
5063 switch (stmt->kind) {
5064 case STATEMENT_DECLARATION: {
5065 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5066 *count += count_local_variables(decl_stmt->declarations_begin,
5067 decl_stmt->declarations_end);
5072 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5081 * Return the number of local (alias free) variables used by a function.
5083 static int get_function_n_local_vars(entity_t *entity)
5085 const function_t *function = &entity->function;
5088 /* count parameters */
5089 count += count_local_variables(function->parameters.entities, NULL);
5091 /* count local variables declared in body */
5092 walk_statements(function->body, count_local_variables_in_stmt, &count);
5097 * Build Firm code for the parameters of a function.
5099 static void initialize_function_parameters(entity_t *entity)
5101 assert(entity->kind == ENTITY_FUNCTION);
5102 ir_graph *irg = current_ir_graph;
5103 ir_node *args = get_irg_args(irg);
5105 ir_type *function_irtype;
5107 if (entity->function.need_closure) {
5108 /* add an extra parameter for the static link */
5109 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5112 /* Matze: IMO this is wrong, nested functions should have an own
5113 * type and not rely on strange parameters... */
5114 function_irtype = create_method_type(&entity->declaration.type->function, true);
5116 function_irtype = get_ir_type(entity->declaration.type);
5121 entity_t *parameter = entity->function.parameters.entities;
5122 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5123 if (parameter->kind != ENTITY_PARAMETER)
5126 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5127 type_t *type = skip_typeref(parameter->declaration.type);
5129 dbg_info *const dbgi = get_dbg_info(¶meter->base.pos);
5130 ir_type *const param_irtype = get_method_param_type(function_irtype, n);
5131 if (var_needs_entity(¶meter->variable)) {
5132 ir_type *frame_type = get_irg_frame_type(irg);
5134 = new_d_parameter_entity(frame_type, n, param_irtype, dbgi);
5135 parameter->declaration.kind = DECLARATION_KIND_PARAMETER_ENTITY;
5136 parameter->variable.v.entity = param;
5140 ir_mode *param_mode = get_type_mode(param_irtype);
5142 ir_node *value = new_rd_Proj(dbgi, args, param_mode, pn);
5144 ir_mode *mode = get_ir_mode_storage(type);
5145 value = create_conv(NULL, value, mode);
5147 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5148 parameter->variable.v.value_number = next_value_number_function;
5149 set_irg_loc_description(current_ir_graph, next_value_number_function,
5151 ++next_value_number_function;
5153 set_value(parameter->variable.v.value_number, value);
5157 static void add_function_pointer(ir_type *segment, ir_entity *method,
5158 const char *unique_template)
5160 ir_type *method_type = get_entity_type(method);
5161 ir_type *ptr_type = new_type_pointer(method_type);
5163 /* these entities don't really have a name but firm only allows
5165 * Note that we mustn't give these entities a name since for example
5166 * Mach-O doesn't allow them. */
5167 ident *ide = id_unique(unique_template);
5168 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5169 ir_graph *irg = get_const_code_irg();
5170 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5173 set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5174 set_entity_compiler_generated(ptr, 1);
5175 set_entity_visibility(ptr, ir_visibility_private);
5176 add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5177 set_atomic_ent_value(ptr, val);
5181 * Create code for a function and all inner functions.
5183 * @param entity the function entity
5185 static void create_function(entity_t *entity)
5187 assert(entity->kind == ENTITY_FUNCTION);
5188 ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5190 if (entity->function.body == NULL)
5193 inner_functions = NULL;
5194 current_trampolines = NULL;
5196 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5197 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5198 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5200 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5201 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5202 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5205 current_function_entity = entity;
5206 current_function_name = NULL;
5207 current_funcsig = NULL;
5210 assert(!ijmp_blocks);
5211 init_jump_target(&ijmp_target, NULL);
5212 ijmp_ops = NEW_ARR_F(ir_node*, 0);
5213 ijmp_blocks = NEW_ARR_F(ir_node*, 0);
5215 int n_local_vars = get_function_n_local_vars(entity);
5216 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5217 current_ir_graph = irg;
5219 ir_graph *old_current_function = current_function;
5220 current_function = irg;
5222 ir_entity *const old_current_vararg_entity = current_vararg_entity;
5223 current_vararg_entity = NULL;
5225 set_irg_fp_model(irg, firm_fp_model);
5226 set_irn_dbg_info(get_irg_start_block(irg),
5227 get_entity_dbg_info(function_entity));
5229 next_value_number_function = 0;
5230 initialize_function_parameters(entity);
5231 current_static_link = entity->function.static_link;
5233 statement_to_firm(entity->function.body);
5235 ir_node *end_block = get_irg_end_block(irg);
5237 /* do we have a return statement yet? */
5238 if (currently_reachable()) {
5239 type_t *type = skip_typeref(entity->declaration.type);
5240 assert(is_type_function(type));
5241 type_t *const return_type = skip_typeref(type->function.return_type);
5244 if (is_type_void(return_type)) {
5245 ret = new_Return(get_store(), 0, NULL);
5247 ir_mode *const mode = get_ir_mode_storage(return_type);
5250 /* ยง5.1.2.2.3 main implicitly returns 0 */
5251 if (is_main(entity)) {
5252 in[0] = new_Const(get_mode_null(mode));
5254 in[0] = new_Unknown(mode);
5256 ret = new_Return(get_store(), 1, in);
5258 add_immBlock_pred(end_block, ret);
5261 if (enter_jump_target(&ijmp_target)) {
5263 size_t const n = ARR_LEN(ijmp_ops);
5264 ir_node *const op = n == 1 ? ijmp_ops[0] : new_Phi(n, ijmp_ops, get_irn_mode(ijmp_ops[0]));
5265 ir_node *const ijmp = new_IJmp(op);
5266 for (size_t i = ARR_LEN(ijmp_blocks); i-- != 0;) {
5267 ir_node *const block = ijmp_blocks[i];
5268 add_immBlock_pred(block, ijmp);
5269 mature_immBlock(block);
5273 DEL_ARR_F(ijmp_ops);
5274 DEL_ARR_F(ijmp_blocks);
5278 irg_finalize_cons(irg);
5280 /* finalize the frame type */
5281 ir_type *frame_type = get_irg_frame_type(irg);
5282 int n = get_compound_n_members(frame_type);
5285 for (int i = 0; i < n; ++i) {
5286 ir_entity *member = get_compound_member(frame_type, i);
5287 ir_type *entity_type = get_entity_type(member);
5289 int align = get_type_alignment_bytes(entity_type);
5290 if (align > align_all)
5294 misalign = offset % align;
5296 offset += align - misalign;
5300 set_entity_offset(member, offset);
5301 offset += get_type_size_bytes(entity_type);
5303 set_type_size_bytes(frame_type, offset);
5304 set_type_alignment_bytes(frame_type, align_all);
5306 irg_verify(irg, VERIFY_ENFORCE_SSA);
5307 current_vararg_entity = old_current_vararg_entity;
5308 current_function = old_current_function;
5310 if (current_trampolines != NULL) {
5311 DEL_ARR_F(current_trampolines);
5312 current_trampolines = NULL;
5315 /* create inner functions if any */
5316 entity_t **inner = inner_functions;
5317 if (inner != NULL) {
5318 ir_type *rem_outer_frame = current_outer_frame;
5319 current_outer_frame = get_irg_frame_type(current_ir_graph);
5320 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5321 create_function(inner[i]);
5325 current_outer_frame = rem_outer_frame;
5329 static void scope_to_firm(scope_t *scope)
5331 /* first pass: create declarations */
5332 entity_t *entity = scope->entities;
5333 for ( ; entity != NULL; entity = entity->base.next) {
5334 if (entity->base.symbol == NULL)
5337 if (entity->kind == ENTITY_FUNCTION) {
5338 if (entity->function.btk != BUILTIN_NONE) {
5339 /* builtins have no representation */
5342 (void)get_function_entity(entity, NULL);
5343 } else if (entity->kind == ENTITY_VARIABLE) {
5344 create_global_variable(entity);
5345 } else if (entity->kind == ENTITY_NAMESPACE) {
5346 scope_to_firm(&entity->namespacee.members);
5350 /* second pass: create code/initializers */
5351 entity = scope->entities;
5352 for ( ; entity != NULL; entity = entity->base.next) {
5353 if (entity->base.symbol == NULL)
5356 if (entity->kind == ENTITY_FUNCTION) {
5357 if (entity->function.btk != BUILTIN_NONE) {
5358 /* builtins have no representation */
5361 create_function(entity);
5362 } else if (entity->kind == ENTITY_VARIABLE) {
5363 assert(entity->declaration.kind
5364 == DECLARATION_KIND_GLOBAL_VARIABLE);
5365 current_ir_graph = get_const_code_irg();
5366 create_variable_initializer(entity);
5371 void init_ast2firm(void)
5373 obstack_init(&asm_obst);
5374 init_atomic_modes();
5376 ir_set_debug_retrieve(dbg_retrieve);
5377 ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5379 /* create idents for all known runtime functions */
5380 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5381 rts_idents[i] = new_id_from_str(rts_data[i].name);
5384 entitymap_init(&entitymap);
5387 static void init_ir_types(void)
5389 static int ir_types_initialized = 0;
5390 if (ir_types_initialized)
5392 ir_types_initialized = 1;
5394 ir_type_char = get_ir_type(type_char);
5396 be_params = be_get_backend_param();
5397 mode_float_arithmetic = be_params->mode_float_arithmetic;
5399 stack_param_align = be_params->stack_param_align;
5402 void exit_ast2firm(void)
5404 entitymap_destroy(&entitymap);
5405 obstack_free(&asm_obst, NULL);
5408 static void global_asm_to_firm(statement_t *s)
5410 for (; s != NULL; s = s->base.next) {
5411 assert(s->kind == STATEMENT_ASM);
5413 char const *const text = s->asms.asm_text.begin;
5414 size_t const size = s->asms.asm_text.size;
5415 ident *const id = new_id_from_chars(text, size);
5420 static const char *get_cwd(void)
5422 static char buf[1024];
5423 if (buf[0] == '\0') {
5424 return getcwd(buf, sizeof(buf));
5429 void translation_unit_to_firm(translation_unit_t *unit)
5431 if (c_mode & _CXX) {
5432 be_dwarf_set_source_language(DW_LANG_C_plus_plus);
5433 } else if (c_mode & _C99) {
5434 be_dwarf_set_source_language(DW_LANG_C99);
5435 } else if (c_mode & _C89) {
5436 be_dwarf_set_source_language(DW_LANG_C89);
5438 be_dwarf_set_source_language(DW_LANG_C);
5440 const char *cwd = get_cwd();
5442 be_dwarf_set_compilation_directory(cwd);
5445 /* initialize firm arithmetic */
5446 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
5447 ir_set_uninitialized_local_variable_func(uninitialized_local_var);
5449 /* just to be sure */
5450 init_jump_target(&break_target, NULL);
5451 init_jump_target(&continue_target, NULL);
5452 current_switch = NULL;
5453 current_translation_unit = unit;
5457 scope_to_firm(&unit->scope);
5458 global_asm_to_firm(unit->global_asm);
5460 current_ir_graph = NULL;
5461 current_translation_unit = NULL;